Added new data service tests, separated date parsing/formatting utilities into DateUtil class

Conflicts:

	openid-connect-server/src/main/java/org/mitre/openid/connect/service/impl/MITREidDataService_1_0.java
	openid-connect-server/src/main/java/org/mitre/openid/connect/service/impl/MITREidDataService_1_X.java
	openid-connect-server/src/main/java/org/mitre/openid/connect/util/DateUtil.java
Better method of creating test AuthenticationHolderEntity, added some more testing to testImport/ExportGrants
Conflicts:

	openid-connect-server/src/test/java/org/mitre/openid/connect/service/impl/TestMITREidDataService_1_1.java
adding netbeans config to gitignore
Added tests for ensuring the references between a refresh token and its authentication holder are preserved over import. Minor cleanup of other tests.
RefreshToken to AuthHolder linkage test now using AuthHolder ID to verify