Fix exception if no data in certs config map

[mmorhun]

What does this PR do?

Provides fix for inability to start second workspace for the user

Screenshot/screencast of this PR

N/A

What issues does this PR fix or reference?

Failure to start second workspace for the user cause by exception:

2020-12-03 07:46:49,827[aceSharedPool-1]  [WARN ] [.i.k.KubernetesInternalRuntime 257]  - Failed to start Kubernetes runtime of workspace workspacem1wn6pmb06ltlsrn.
java.lang.NullPointerException: null
	at org.eclipse.che.workspace.infrastructure.kubernetes.provision.KubernetesTrustedCAProvisioner.provision(KubernetesTrustedCAProvisioner.java:117)
	at org.eclipse.che.workspace.infrastructure.kubernetes.KubernetesEnvironmentProvisioner$KubernetesEnvironmentProvisionerImpl.provision(KubernetesEnvironmentProvisioner.java:185)
	at org.eclipse.che.workspace.infrastructure.kubernetes.wsplugins.PluginBrokerManager.getTooling(PluginBrokerManager.java:118)
	at org.eclipse.che.workspace.infrastructure.kubernetes.wsplugins.SidecarToolingProvisioner.provision(SidecarToolingProvisioner.java:90)
	at org.eclipse.che.workspace.infrastructure.kubernetes.KubernetesInternalRuntime.provisionWorkspace(KubernetesInternalRuntime.java:288)
	at org.eclipse.che.workspace.infrastructure.kubernetes.KubernetesInternalRuntime.internalStart(KubernetesInternalRuntime.java:204)
	at org.eclipse.che.api.workspace.server.spi.InternalRuntime.start(InternalRuntime.java:141)
	at org.eclipse.che.api.workspace.server.WorkspaceRuntimes$StartRuntimeTask.run(WorkspaceRuntimes.java:969)
	at org.eclipse.che.commons.lang.concurrent.CopyThreadLocalRunnable.run(CopyThreadLocalRunnable.java:38)
	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(Unknown Source)
	at io.micrometer.core.instrument.internal.TimedRunnable.run(TimedRunnable.java:44)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at org.eclipse.che.commons.observability.CountedThreadFactory.lambda$newThread$0(CountedThreadFactory.java:75)
	at java.base/java.lang.Thread.run(Unknown Source)
2020-12-03 07:46:49,903[aceSharedPool-1]  [INFO ] [o.e.c.a.w.s.WorkspaceRuntimes 995]   - Workspace 'admin:golang-omt8y' with id 'workspacem1wn6pmb06ltlsrn' start failed
2020-12-03 07:46:49,903[aceSharedPool-1]  [ERROR] [o.e.c.a.w.s.WorkspaceRuntimes 1005]  - An exception occurred.
org.eclipse.che.api.workspace.server.spi.InternalInfrastructureException: An exception occurred.
	at org.eclipse.che.workspace.infrastructure.kubernetes.KubernetesInternalRuntime.wrapAndRethrow(KubernetesInternalRuntime.java:966)
	at org.eclipse.che.workspace.infrastructure.kubernetes.KubernetesInternalRuntime.internalStart(KubernetesInternalRuntime.java:277)
	at org.eclipse.che.api.workspace.server.spi.InternalRuntime.start(InternalRuntime.java:141)
	at org.eclipse.che.api.workspace.server.WorkspaceRuntimes$StartRuntimeTask.run(WorkspaceRuntimes.java:969)
	at org.eclipse.che.commons.lang.concurrent.CopyThreadLocalRunnable.run(CopyThreadLocalRunnable.java:38)
	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(Unknown Source)
	at io.micrometer.core.instrument.internal.TimedRunnable.run(TimedRunnable.java:44)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at org.eclipse.che.commons.observability.CountedThreadFactory.lambda$newThread$0(CountedThreadFactory.java:75)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException: null
	at org.eclipse.che.workspace.infrastructure.kubernetes.provision.KubernetesTrustedCAProvisioner.provision(KubernetesTrustedCAProvisioner.java:117)
	at org.eclipse.che.workspace.infrastructure.kubernetes.KubernetesEnvironmentProvisioner$KubernetesEnvironmentProvisionerImpl.provision(KubernetesEnvironmentProvisioner.java:185)
	at org.eclipse.che.workspace.infrastructure.kubernetes.wsplugins.PluginBrokerManager.getTooling(PluginBrokerManager.java:118)
	at org.eclipse.che.workspace.infrastructure.kubernetes.wsplugins.SidecarToolingProvisioner.provision(SidecarToolingProvisioner.java:90)
	at org.eclipse.che.workspace.infrastructure.kubernetes.KubernetesInternalRuntime.provisionWorkspace(KubernetesInternalRuntime.java:288)
	at org.eclipse.che.workspace.infrastructure.kubernetes.KubernetesInternalRuntime.internalStart(KubernetesInternalRuntime.java:204)
	... 9 common frames omitted

How to test this PR?

Start two workspaces simultaniously

PR Checklist

As the author of this Pull Request I made sure that:

• The Eclipse Contributor Agreement is valid
• Code produced is complete
• Code builds without errors
• Tests are covering the bugfix
• The repository devfile is up to date and works
• Sections What issues does this PR fix or reference and How to test this PR completed
• Relevant user documentation updated
• Relevant contributing documentation updated
• CI/CD changes implemented, documented and communicated

Reviewers

Reviewers, please comment how you tested the PR when approving it.

[che-bot]

✅ E2E Happy path tests succeed 🎉

See Details

• Jenkins job

• logs and configs

• Happy path tests DevFile

• image: maxura/che-server:18519

Tested with Eclipse Che Multiuser User on K8S (minikube v1.1.1)

• Use comment "[crw-ci-test]" to rerun happy path E2E test.
• Use comment "[crw-ci-test --rebuild]" to re-build the images and rerun happy path E2E test.

[sleshchenko]

A || !(B || C) is hard to read and understand.
The following can be a bit easier if A || !B && !C!
If empty OR not the same (not equals in pointers terms && does not have the same values)

WDYT?

[mmorhun]

Conditions B and C are logically related so, to my mind, it is clearer to leave that as is.