Add timeout on openShiftVerify steps in JenkinsFile

[kevinearls]

If for some reason the Jaeger deployment fails during a test, it can take up to 10 minutes to time out, and at the current time Jenkins refuses to let you abort the test. The openShiftVerifyService statements in the Jenkinsfile https://github.com/Hawkular-QE/jaeger-standalone-performance-tests/blob/master/Jenkinsfile#L104-L105 should be updated to include a timeout.

This may take some research, because as of this writing the Jenkins Pipeline snippet generator shows an "Operation wait time" option under the advanced fields, but does not generate any code for this.