CP-8629: Add travis and coveralls badges
CP-8629: Add travis and coveralls badges

The badges will display the build status of the master branch.

Signed-off-by: Siddharth Vinothkumar <dfecda33490a98eb9acd390f514dd6b90713a050@citrix.com>
Reviewed-by: Mate Lakat <c9738e4c994fd7ce84ba48d79abf74ae257dc234@citrix.com>

djs55/sm,pritha-srivastava/sm,BobBall/sm,siddharthv/sm,martinjorge/sm,robertbreker/sm,xapi-project/sm,germanop/sm,robertbreker/sm,malcolmcrossley/sm,chandrikas/sm,malcolmcrossley/sm,kostaslamda/sm,BobBall/sm,kostaslamda/sm,djs55/sm,martinjorge/sm,chandrikas/sm,xapi-project/sm,siddharthv/sm,pritha-srivastava/sm,xapi-project/sm,geosharath/sm,chandrikas/sm,djs55/sm,germanop/sm,geosharath/sm,BobBall/sm,geosharath/sm,pritha-srivastava/sm,kostaslamda/sm,martinjorge/sm,germanop/sm,siddharthv/sm,robertbreker/sm,malcolmcrossley/sm