Stop catting tempest.config during tempest setup

This commit removes the 'cat tempest.config' from lib/tempest. There
is no reason to cat it as part of running devstack because the file
is and can be interacted with after devstack finishes running. To
prevent a loss of information in the gate this change should be
coupled with devstack-gate change: Ifb36918cd0d686cb3865f5322cd62c209acaaf30
which copies the tempest.config file with the other test artifacts.

Change-Id: Ia01cd53660b3490ea9faa9e9c746bafd9df12a9b
Fix service name for marconi

This patch updates TEMPEST_SERVICES, to have the same name as devstack
marconi service.

Change-Id: Ibc9b4a66fccd3d95ddd1717bf549476bd843204a
Implements: blueprint add-basic-marconi-tests
Don't warn about heat modifying flavors

Since de0898a Heat no longer modifies flavors, so the comment
and output related to modified flavors is no longer needed.

Change-Id: I1007d2ab3387f28b8d7487f450cab4592f2824aa
Merge "Fix service name for marconi"
Merge "Don't warn about heat modifying flavors"
Merge "Stop catting tempest.config during tempest setup"