Fixes recursive-include in MANIFEST

The MANIFEST was only including py and xml files from the osm_mon package.
The vROPs plugin uses a install.sh file to work. Added *.sh files to the
recursive include.

Signed-off-by: Benjamin Diaz <bdiaz@whitestack.com>
Change-Id: I23d5c844b6fbb99bbf41916cee2376a2c51fc6c6