clear() for HaspMaps and HashSets now ues fast blanking
No point in resetting the allocated array in Sets if the type is primitive + cosmetic template tags change
(cherry pick of hash-strategy-for-map-sets)

Conflicts:
	binaries/hppc-0.6.0-SNAPSHOT-jdk15.jar
	binaries/hppc-0.6.0-SNAPSHOT-sources.jar
Experiment: perf improvements
a) Batch clearing also of array of states (booleans)
b) Removed useless clearing of keys/values while reallocating the
HashMap/Sets
(cherry pick from  hash-strategy-for-map-sets)
Conflicts:
	binaries/hppc-0.6.0-SNAPSHOT-jdk15.jar
	binaries/hppc-0.6.0-SNAPSHOT-sources.jar
	hppc-core/src/main/templates/com/carrotsearch/hppc/HashContainerUtils.java
	hppc-core/src/main/templates/com/carrotsearch/hppc/KTypeOpenHashSet.java
	hppc-core/src/main/templates/com/carrotsearch/hppc/KTypeVTypeOpenHashMap.java