Doc Version bump to 6.1.1 (Do not commit before 6/19)

Fixes elastic#8857

Add release notes for 6.1.0 (elastic#8832)

Bump gemspecs for 5.6.5

Fixes elastic#8779

fix queue open bug for fully acked in-between pages plus new test

elastic#8596 retry until Vagrant ssh bootstrapping finishes

Fixes elastic#8615

Release notes + docs bump for 5.6.4

Fixes elastic#8595

fix broken links in docs (elastic#8542)

PERFORMANCE: filter_func can optionally take an array of events to ma…

…ke batched filters much faster

Fixes elastic#8428

Fixes elastic#8444

Fixes elastic#8445

Bump doc versions as well

Fixes elastic#8407

pick jvm.options for rspec.bat