Property modernization w/ Gaudi v28 (AthenaBaseComps-00-08-00)

	* updates for Property modernization. see gaudi/Gaudi!182
	* requires Gaudi v28
	* tag AthenaBaseComps-00-08-00

M       test/AthReentrantAlgorithm_test.cxx
M       test/propertyHandling_test.cxx
M       AthenaBaseComps/AthAlgTool.h
M       AthenaBaseComps/AthReentrantAlgorithm.h
M       AthenaBaseComps/AthAlgorithm.h

2016-12-07 Jack Cranshaw <cranshaw@anl.gov>
	* Tagging AthenaBaseComps-00-07-21
	* Add EventContext aware call to DecisionSvc

scott snyder  <snyder@bnl.gov>
2016-10-31  scott snyder  <snyder@bnl.gov>

	* Tagging AthenaBaseComps-00-07-20.
	* Get unordered_map from stdlib.

...
(Long ChangeLog diff - truncated)