Align benchs on Robin-hood branch
to ease comparison, plus some small needed additions
(capacity() for all)
Align deps and benches en RobinHood branch
for comparison
Updated Benchs with various distributions values

Conflicts:
	hppc-benchmarks/src/main/java/com/carrotsearch/hppc/jub/HashCollisionsCornerCaseTest.java
	hppc-benchmarks/src/main/java/com/carrotsearch/hppc/misc/HppcMapSyntheticBench.java
Turn HashCollisionsCornerCaseTest into a Caliper bench

Conflicts:
	hppc-benchmarks/src/main/java/com/carrotsearch/hppc/jub/HashCollisionsCornerCaseTest.java