heat tests : functional tests remove erroneous finally clause

Some tests have had a finally clause added which means they delete the
stack before doing any tests, even when it is created successfully.  Doh!

Change-Id: I7cefd313b9f810067304fe19f58a038226555b86
Signed-off-by: Steven Hardy <shardy@redhat.com>
heat tests : CFN_API functional tests NoEcho Parameters fix

NoEcho is now implemented in the engine for parameters, so we
need to change the expected ParameterValues to '******' to match
the API response for the NoEcho==True parameters

Change-Id: I4f50633dc5358e8779bfbaf03dda2f7fe1b7d452
Signed-off-by: Steven Hardy <shardy@redhat.com>