Prevent triggering unnecessary genesis jobs when docs change

Prevent triggering unnecessary genesis jobs when docs change

Genesis verify and merge jobs run full builds when only doc updates come in.
This change adds non-doc paths to the list of excluded paths in gerrit trigger
configurations, essentially only running what needs to be run.

Please note that if a change touches both allowed and excluded paths, none of the
jobs will be triggered. Due to this doc and code changes should not be done in same
change.

JIRA: RELENG-19

Change-Id: I0388b8fb940aa7581e9afb56ffa04ca3a3763820
Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>