Add ONAP standard Control Loop Element types

Add ONAP standard Control Loop Element types

The Policy, DCAE, HTTP, Kubernetes, and CDS Control Loop Elements run on
participants delivered with and packaged with ONAP. These TOSCA files
define the properties for Control Loop Elements on these participants as
TOSCA node types.

Developers who wish to run Control Loop Elements on these participants
write a TOSCA Topology Template, which uses the Control Loop Element
Node Types defined in these files.

These Node type definitions should be preloaded into the
Runtime database, which will be done in a future review.

Issue-ID: POLICY-3341
Change-Id: Icc565bdfa1a59e1c1c551f13c48348ee6a8a4e27
Signed-off-by: liamfallon <liam.fallon@est.tech>