Make name node state work on cloudera4 releases

CDH4 doesn’t contain the NameNodeStatus bean.  Instead, it appears that
the same data is available in FSNamesystem under the tag.HAState.  But,
because get_field2 auto splits if there’s a dot in the bean name being
referenced, we need to tell this not to split.

There will be a separate pull request to update HariSekhonUtils.pm in lib/.