assets: bower command --output-file option
assets: bower command --output-file option

* Adds --output-file/-o option to inveniomanage bower command to fix
  an issue where Raven (Sentry) would print output in bower.json.

* NOTE Deprecates --override/-x option in inveniomanage bower
  command.

Signed-off-by: Lars Holm Nielsen <7eaffca9f7cd98839b5821d0d23e09ff764b82cd@cern.ch>

inveniosoftware/invenio,tiborsimko/invenio,tiborsimko/invenio,inveniosoftware/invenio