Update README file to add description about running tests
Update README file to add description about running tests

Describing how to run style checks and unit tests

Story: 2001657
Task: 6689

Change-Id: I3853edaafcaf30d862185b3ec4e4a75b28717933
Signed-off-by: Amir Mofakhar <42333bdc2a78dc8174b29ac2eb51a875c597f7e9@op5.com>

stackforge/monasca-ui,stackforge/monasca-ui,openstack/monasca-ui,stackforge/monasca-ui,stackforge/monasca-ui,openstack/monasca-ui,openstack/monasca-ui,openstack/monasca-ui