[MDSAL-398] Optimize LazyDataObject method dispatch - OpenDaylight JIRA

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LazyDataObject method dispatch is a bit sub-optimal, as it does not take advantage:

Java 8's Method.getArgumentCount()
Ability to switch on strings coupled with method names being interned
The fact that getters have zero arguments and hence are uniquely identified by their name

Address these issues, hence further improving LazyDataObject hot path.

relates to

MDSAL-399 Use MethodHandles in LazyDataObject to acquire foreign data

#	Subject	Branch	Project	Status	CR	V
77873,3	Use Method.getParameterCount()	master	mdsal	Status: MERGED	+2	+1
77874,3	Switch on parameterCount	master	mdsal	Status: MERGED	+2	+1
77875,4	Switch on method names	master	mdsal	Status: MERGED	+2	+1
77876,3	Index cached data by method name	master	mdsal	Status: MERGED	+2	+1
77877,2	Use Method.getParameterCount()	master	controller	Status: MERGED	+2	+1
77878,3	Use Method.getParameterCount()	stable/fluorine	controller	Status: MERGED	+2	+1
77879,1	Use Method.getParameterCount()	stable/oxygen	controller	Status: MERGED	+2	+1
77881,2	Use Method.getParameterCount()	stable/fluorine	mdsal	Status: MERGED	+2	+1
77882,2	Switch on parameterCount	stable/fluorine	mdsal	Status: MERGED	+2	+1
77883,3	Switch on method names	stable/fluorine	mdsal	Status: MERGED	+2	+1
77884,3	Index cached data by method name	stable/fluorine	mdsal	Status: MERGED	+2	+1
77886,1	Use Method.getParameterCount()	stable/oxygen	mdsal	Status: MERGED	+2	+1
77887,1	Switch on parameterCount	stable/oxygen	mdsal	Status: MERGED	+2	+1
77888,2	Switch on method names	stable/oxygen	mdsal	Status: MERGED	+2	+1
77889,2	Index cached data by method name	stable/oxygen	mdsal	Status: MERGED	+2	+1
77890,9	Index nonnull/getter methods by String	master	mdsal	Status: MERGED	+2	+1
77911,2	Index getter methods by String	master	mdsal	Status: ABANDONED	0	0
78042,5	Index getter methods by String	stable/fluorine	mdsal	Status: MERGED	+2	+1
78043,3	Index getter methods by String	stable/oxygen	mdsal	Status: MERGED	+2	+1