Fix import policy issues
The following issues are addressed:
When a service is imported containing polices, a new name for the policy is generated instead of using the name from the imported service
When a service is imported containing policies with a string value set for a property of a policy, then the value is created in the new service surrounded with quotes
NPE when service imported with no instances
NPE when service imported with instances with no requirements
Signed-off-by: MichaelMorris <michael.morris@est.tech>
Issue-ID: SDC-4224
Change-Id: I8403c0564796a045816ae28e52961688ca7804db