The method AbstractHashedMap#ensureCapacity is not tested

Hi Apache 🏹!

I notice that method AbstractHashedMap#ensureCapacity seems quite important, it is executed 11885 times by the test suite.

Yet, when I completely remove the body of the method, leaving the method doing nothing, no test breaks.

It that normal or should we add test or an assertion to specify its behavior?

Thanks a lot for the great library!

--Martin