Added getPolicy_ServiceForPeople function

Jira-issue: WP-1137
Added getPolicy_ServicesForPeople function

Jira-issue: WP-1137
Added getPolicy_PeopleForServices function

Jira-issue: WP-1137
Added setPolicy_ServiceForPeople function

This is only a draft, the function doens't work properly.
In particular the addPolicy call fails.

Jira-issue: WP-1137
Fixed addPolicy call

Jira-issue: WP-1137
Fixed "save" api policy method

Jira-issue: WP-1137
Added call to testNewPolicy

The new policy is now tested before to save it.

Jira-issue: WP-1137
Restored service-id tag

After the fix of the policy manager (WP-1141) it is
possible to use service-id tag instead of api-feature

Jira-issue: WP-1137
Merge pull request #5 from ccameroni/WP-1137-simplified-editing

WP-1137 simplified editing