Clear heat inner functionaltests

This patch remove regression tests from heat tempest plugin. We
already maintain those tests in heat.

Also remove AutoscalingLoadBalancerTest and ReloadOnSighupTest
since we don't test anymore.

Depends-On: Ief31dc961bc108e2863119598dfb16581a38e9cf
Change-Id: I022077c92bc10e908c7fe549ed555ad0194e0704
32 files changed