Use the full template search path for notification templates (which includes template directories contributed by plugins).
Use the full template search path for notification templates (which includes template directories contributed by plugins).

git-svn-id: eda3d06fcef731589ace1b284159cead3416df9b@3500 af82e41b-90c4-0310-8c96-b1721e28e2e2

walty8/trac,walty8/trac,walty8/trac,jun66j5/trac-ja,walty8/trac,netjunki/trac-Pygit2,jun66j5/trac-ja,jun66j5/trac-ja,netjunki/trac-Pygit2,jun66j5/trac-ja,netjunki/trac-Pygit2