Remove redundant heat templates from codebase

Reasons:
 - Heat templates are not unique anymore:
   - last thing was - dependency on tcp/udp ports from configuration.

Changes:
 - use default.heat.template for each datastore;
 - removed all {datastore}/heat.templates;

Behaviour:
 - deployer still can use custom templates for each of datastores;

Change-Id: Ifc8b23e4158fd20c7fc3ed8701660747962d5506
Closes-Bug: #1328464
Merge "Remove redundant heat templates from codebase"