Switch from hamcrest-core to hamcrest package
Switch from hamcrest-core to hamcrest package

The hamcrest-core artifact is from the Hamcrest 1.x release.  Hamcrest
2.x reworked the packaging.  The contents of hamcrest-core were placed
inside the new artifact 'hamcrest'.

Exclude the hamcrest-core dependency from other artifacts so that they
will use the contents of the hamcrest artifact.

jenkinsci/git-plugin,martinda/git-plugin,MarkEWaite/git-plugin,MarkEWaite/git-plugin,jenkinsci/git-plugin,martinda/git-plugin,jenkinsci/git-plugin,MarkEWaite/git-plugin,martinda/git-plugin,jenkinsci/git-plugin,MarkEWaite/git-plugin