This reverts commit 0dc0db932e.
The original change caused our host state processing to be inconsistent
with our own hypervisors API. Automation tooling that used our API
to add hosts to aggregates would fail silently. We are reverting
this and will propose a check on the aggregate host add action
which will confirm the case-sensitive mapping of the host being
added, which is what we should have done in the first place.
Change-Id: Ibd44ba9de5680958f55f0ae6325cfc33dabadc4c
Closes-Bug: #1793747
(cherry picked from commit c9448cbdbf)