Add overcommit config with ForbiddenBranches enabled

Disable default overcommit commit message checks

[#161332276]

Signed-off-by: Andrew Chang <anchang@pivotal.io>

Author: Alexander Berezovsky

.overcommit.yml

@@ -0,0 +1,45 @@
+# Use this file to configure the Overcommit hooks you wish to use. This will
+# extend the default configuration defined in:
+# https://github.com/brigade/overcommit/blob/master/config/default.yml
+#
+# At the topmost level of this YAML file is a key representing type of hook
+# being run (e.g. pre-commit, commit-msg, etc.). Within each type you can
+# customize each hook, such as whether to only run it on certain files (via
+# `include`), whether to only display output if it fails (via `quiet`), etc.
+#
+# For a complete list of hooks, see:
+# https://github.com/brigade/overcommit/tree/master/lib/overcommit/hook
+#
+# For a complete list of options that you can use to customize hooks, see:
+# https://github.com/brigade/overcommit#configuration
+#
+# Uncomment the following lines to make the configuration take effect.
+---
+verify_signatures: false
+
+CommitMsg:
+  # SpellCheck:
+  #   enabled: true
+  #   description: 'Check for misspelled words'
+  #   required_executable: 'aspell'
+  #   flags: ['-a']
+
+  CapitalizedSubject:
+    enabled: false
+
+  EmptyMessage:
+    enabled: false
+
+  TrailingPeriod:
+    enabled: false
+
+  TextWidth:
+    enabled: false
+
+  SingleLineSubject:
+    enabled: false
+
+PreCommit:
+  ForbiddenBranches:
+    enabled: true
+    branch_patterns: ['master']