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Add a common label to all resources on `kube apply'

Add "template=<ID>" label to all resources with a Labels field declared
during the Template to Config transformation, so these resources can be
later referenced as a group.
- Service.Labels
- Pod.Labels
- ReplicationController.Labels
- ReplicationController.DesiredState.PodTemplate.Labels
Add tests for config AddConfigLabels() and mergeMaps() functions
Refactor TestValidateTemplate() into a table driven test
Merge pull request #137 from VojtechVitek/config_labels

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Merge pull request #176 from VojtechVitek/template_validation_test

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Fix #180: Remove traling slash from client Host
Merge pull request #184 from VojtechVitek/180-slash_suffix

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Merge pull request #136 from jhadvig/retrieve_build_logs

Merged by openshift-bot