Commit 3bde74c279 introduced a bug in the REST API. Methods other
than GET could not be used anymore from plugins. For example it was not
possible anymore to delete projects with the delete-plugin using DELETE.
Bug: issue 2949
Change-Id: If90247ec4e0dad03b02d0a9e21202455fece90a7
Signed-off-by: Stefan Lay <stefan.lay@sap.com>