GitLab

- Upgraded parent project to 7.6.1
- Upgraded authzforce-ce-core-pdp-api dependency to 17.0.0
- Support for combining multiple Policy Providers as one
- Changed (enhancement) the PDP XML schema to support:
    - Multiple policyProvider elements
	- Inline PolicySets in StaticPolicyProvider type (XACML PolicySets
embedded in the PDP configuration), in addition to policy locations
(URLs)
- Core StaticPolicyProvider enhancement:
	- Support of inline PolicySets defined in the XML config as input (new
'policy' element), may be combined with policyLocations (URLs)
	- Support of third-party static policy provider to help resolve policy
references not supported internally; in other words, the policy provider
can be combined with other static policy providers.
- Replace use of guava Charset class with standard java Charset