Include @group annotations in the report

[techhemant]

We've tagged each tests with relevant groups. We'd like to filter/ categorise/ see test belonging to a group, together. I see that we don't pass group information to xmls. Can we add it as a feature?

/**
 * Tests if this works
 * @group Basic_Test
 * @group Login
 * @group Logout
 */
class ThisIsATest extends BaseTest {
}