Normative Tag Challenges: on wd33

Four new questions/challenges on wd33, that need be resolved for completing TA specification:

1. Questionable normative tag (not testable): PR-61
"To register a Plan by value, a Consumer SHALL send an HTTP POST request to the URL of the Plans resource as described in this section. [PR-61]."
In other places, we removed such statements that are pseudo-requirements for Consumers, and have the normative behavior be turned into a requirement for the Provider: of the kind: "When receiving a POST request to the URL of the Plans , the Provider SHALL..."

2. Questionable normative tag (not testable):
"To register a Plan by reference, a Consumer SHALL send an HTTP POST request to the URL of the Plans resource as described in this section. [PR-56]"

3.
"The schema of the plan resource returned from a CAMP Provider SHALL conform to the schema for Plans described in Section 3.3, "Plan Schema", with the following additional requirements: [RMR-07]"
"Plan Schema", is in fact Section 4.3.
But RMR-07 seems redundant with PLAN-09.

4. Unclear how to test separately acceptance of the "application/json" media type.

• "To support the deployment of applications via a reference to either a PDP or a Plan file, Providers SHALL accept the "application/json" media type. [PR-68]"
• "To support the registration of Plans via a reference to either a PDP or a Plan file, Providers SHALL accept the "application/json" media type. [PR-69]"
  How different from:
  -"Providers SHALL provide representations of all available resources in JSON. [PR-01]"