heat-manage man page not generated in doc build

Was missing entry in the build configuration file.

Change-Id: I38a28a39936381303f87c676baa7075d5aa87440
Closes-bug: #1259674
Add validation for an existence of a resource type

Validation of resource type existence was missing.
The patch adds validation checks that in the template the resource
type is set and is not an empty string.

Change-Id: I171644010ec868e8acc4c29556889256e8bf51b6
Closes-Bug: #1257243
Change assertTrue(A in B) to assertIn(A, B)

The code in tests was using assertTrue(A in B) and similar
instead of assertIn / assertNotIn.

assertIn / assertNotIn assertions are provided by `testtools` package,
so this change is not breaking backward compatibility with Python 2.6.

Closes-Bug: #1259295

Change-Id: Ibf3b0c7f27895699db8a13bf6e1640d196f1a953
pep8 fix: assertEquals -> assertEqual

Change is necessary due to update to hacking 0.8.0, which is in
alignment with project standards.

Change-Id: I012958e63d9e0efaf36ee57fe9102e835ef8533c
Closes-bug: #1218190
Merge "Add validation for an existence of a resource type"
Merge "pep8 fix: assertEquals -> assertEqual"
Merge "Change assertTrue(A in B) to assertIn(A, B)"
Merge "heat-manage man page not generated in doc build"