Retrieve data related to a specific Subject
Added basic method to filter policy and policy-set elements by Subject

Jira issue: WP-1135
Added testNewPolicy method

Jira-issue: WP-1140
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
Fixed testNewPolicy parameter

Now the first parameter format is consistent with that
of other api policy methods

Jira-issue: WP-1140
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 #6 from smonteleone/WP-1135

Retrieve data related to a specific Subject
Merge pull request #4 from ccameroni/WP-1140-test-modified-policies

WP-1140 test modified policies
Merge pull request #5 from ccameroni/WP-1137-simplified-editing

WP-1137 simplified editing