…al-sniffer

…p versions

Plugins that have flaky tests due to infra requirements etc should opt
in to this.

Adding failsafe allows people to write JenkinsRule style tests as ITs so
that they can easily run normal unit tests and git quicker feedback in
isolation from failsafe style tests with slower feedback should they
desire.

jacoco needs to be bound to its default verify in order to pick up
coverage from IT tests

installing and configuring git should be pretty simple.

WHilst the m-r-p should do this there are occaisons where it does not,
and we do not actually force people to release with the m-r-p

snapshot parent...

(but in reality it is just 1.8)

thus this profile was as much use as a chocolate fire guard and has been
terminated with extreme prejudice

without it JenkinsRule tests fail with things like

```
  26.565 [id=86]        WARNING
  h.ExtensionFinder$GuiceFinder$FaultTolerantScope$1#error: Failed to
  instantiate Key[type=jenkins.slaves.JnlpSlaveAgentProtocol4,
  annotation=[none]]; skipping this component
  java.security.KeyStoreException: JENKINS-41987: no X509Certificate
  found; perhaps instance-identity module is missing or too old
  at
  jenkins.slaves.JnlpSlaveAgentProtocol4.<init>(JnlpSlaveAgentProtocol4.java:105)
  at
  jenkins.slaves.JnlpSlaveAgentProtocol4$$FastClassByGuice$$b470638c.newInstance(<generated>)
  at
  com.google.inject.internal.cglib.reflect.$FastConstructor.newInstance(FastConstructor.java:40)
  at
  com.google.inject.internal.DefaultConstructionProxyFactory$1.newInstance(DefaultConstructionProxyFactory.java:61)
  at
  com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:105)
  at
  com.google.inject.internal.ConstructorInjector.access$000(ConstructorInjector.java:32)
  at
  com.google.inject.internal.ConstructorInjector$1.call(ConstructorInjector.java:89)
  at
  com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:115)
  at
  hudson.ExtensionFinder$GuiceFinder$SezpozModule.onProvision(ExtensionFinder.java:567)
  at
  com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:126)
  at
  com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:68)
  at
  com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:87)
  at
  com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:267)
  at
  com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46)
  at
  com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1103)
  at
  com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
  Caused: com.google.inject.ProvisionException: Unable to provision, see
  the following errors:
  1) Error injecting constructor, java.security.KeyStoreException:
  JENKINS-41987: no X509Certificate found; perhaps instance-identity
  module is missing or too old
  at
  jenkins.slaves.JnlpSlaveAgentProtocol4.<init>(JnlpSlaveAgentProtocol4.java:101)
  1 error
  at
  com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:52)
  at
  com.google.inject.internal.SingletonScope$1.get(SingletonScope.java:145)
  at
  hudson.ExtensionFinder$GuiceFinder$FaultTolerantScope$1.get(ExtensionFinder.java:439)
  at
  com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:41)
  at
  com.google.inject.internal.InjectorImpl$2$1.call(InjectorImpl.java:1016)
  at
  com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092)
  at
  com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:1012)
  at hudson.ExtensionFinder$GuiceFinder._find(ExtensionFinder.java:401)
  at hudson.ExtensionFinder$GuiceFinder.find(ExtensionFinder.java:392)
  at
  hudson.ClassicPluginStrategy.findComponents(ClassicPluginStrategy.java:344)
  at hudson.ExtensionList.load(ExtensionList.java:381)
  at hudson.ExtensionList.ensureLoaded(ExtensionList.java:317)
  at hudson.ExtensionList.iterator(ExtensionList.java:172)
  at jenkins.AgentProtocol.of(AgentProtocol.java:112)
  at
  hudson.TcpSlaveAgentListener$ConnectionHandler.run(TcpSlaveAgentListener.java:284)
```

It just caused confusion introduced in jenkinsci#204 with comment
https://github.com/jenkinsci/plugin-pom/pull/204/files#r288900798

Do not use a property to activate a profile, just activate the profile
directly

Co-Authored-By: Oleg Nenashev <o.v.nenashev@gmail.com>