Add support for BuildConfig and Build objects

[pehala]

• Added Build and BuildConfig classes for their respective objects.
• Changed handling of not empty stderr in oc_command.
  • Now it will not fail if return code is successful but stderr is not empty, it will instead just throw a warning.
  • Reasoning: Starting build from a local directory will write upload progress to stderr but will still succeed.
• Added option to pass *args to execute method of OpenshiftKind.
  • Reasoning: start-build command needs the name of the build.
• Switched order of *args and **opts when executing a command.
  • Reasoning: start-build needs name of the build as a first argument.
• Added option to pass type to update of OpenshiftKind.
  • Reasoning: Executing command like this one:
    • oc patch dc/system-app -p '[{"op": "add", "path": "/spec/strategy/rollingParams/pre/execNewPod/env/-", "value": {"name": "ORACLE_SYSTEM_PASSWORD", "value": "<<<<SYSTEM_PASSWORD>>>>"}}]' --type=json