openshiftStartBuild step unit test

[dtschan]

Implement unit test for openshiftStartBuild step which tests:

• Works whether oc is in PATH or not

  • Installs oc if not in PATH

• If fromDir is provided:

  • Executes oc start-build --from-dir=${fromDir} bc/${buildConfigName}

• Else if fromFile is provided:

  • Executes oc start-build --from-file=${fromFile} bc/${buildConfigName}

• Else

  • Executes oc start-build bc/${buildConfigName}

• Executes oc logs -f ${build} to wait for the build to complete, where build is the build object type and name returned by oc start-build.

• Fails the Jenkins build when the OpenShift build fails, i.e. the builds object .status.phase field is Failed.

[chrira]

First tests implemented with #43