OPENDJ-1308 Migrate schema support


Added many tests for TimeBasedMatchingRuleFactory in view of porting this class to the SDK.
Started to adapt its API to the SDK APIs.



NotImplementedAssertion.java: ADDED
Added to stop adding the same code for the not implemented Assertion.createIndexQuery().
To be removed once we switch the schema to the SDK.

AbstractMatchingRule.java
Used NotImplementedAssertion.

AbstractOrderingMatchingRule.java:
Implemented getAssertion().

CollationMatchingRuleFactory.java:
Extracted method copyNames().

TimeBasedMatchingRuleFactory.java:
Extracted multiplyByTenThenAddUnits().
Implemented {RelativeTimeGTOrderingMatchingRule|RelativeTimeLTOrderingMatchingRule}.getAssertion() + moved createIndexQuery() to this inner class.
In normalizeAssertionValue(), made code more readable.
Extracted method toCalendarMonth(), isDateInvalid(), isLeapYear(), logAndThrow(), createExactMatchQuery().
Fixed javadocs.


TimeBasedMatchingRuleFactoryTest.java: ADDED

TimeBasedMatchingRuleTest.java:
Code cleanup.