Added test_catalog.py under cfme_pages tests .

Added test_catalog.py under cfme_pages tests for now.
Will add the test in cfme_test after inital review.
Catalog_subpages folder 
Automate_subpages folder
Added for catalogs in headermenu.py
call for catalog classes in service.py

Signed-off-by: Shveta <sshveta@redhat.com>