cluster up: fix host volume share creation

[csrwng]

Fixes check in volume dir bind mount command and collapses two separate container runs with a single one.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1467557

[csrwng]

@openshift/devex ptal

[bparees]

lgtm

[csrwng]

[testextended][extended:clusterup]

[openshift-bot]

Evaluated for origin testextended up to 71a9ca3

[openshift-bot]

continuous-integration/openshift-jenkins/testextended SUCCESS (https://ci.openshift.redhat.com/jenkins/job/test_pull_request_origin_extended/825/) (Base Commit: 289cf8f) (PR Branch Commit: 71a9ca3) (Extended Tests: clusterup)

[csrwng]

[merge][severity:bug]

[openshift-bot]

[Test]ing while waiting on the merge queue

[openshift-bot]

Evaluated for origin test up to 71a9ca3

[openshift-bot]

continuous-integration/openshift-jenkins/test SUCCESS (https://ci.openshift.redhat.com/jenkins/job/test_pull_request_origin/3001/) (Base Commit: 5c24881) (PR Branch Commit: 71a9ca3)

[bparees]

flake #15093
[merge]

[openshift-bot]

Evaluated for origin merge up to 71a9ca3

[openshift-bot]

continuous-integration/openshift-jenkins/merge SUCCESS (https://ci.openshift.redhat.com/jenkins/job/merge_pull_request_origin/1249/) (Base Commit: 83efc33) (PR Branch Commit: 71a9ca3) (Extended Tests: bug) (Image: devenv-rhel7_6427)