Adds local storage Boot support on PXE failures.

When used with partition image, adds capability to be able to
boot from local storage upon first PXE boot so that if subsequent
PXE boot fails, instances can still boot from local storage.

Change-Id: I4f412b604c1b21ef14c7e578851887fe7b7d0f7d
Update mysql element to work better with OpenSuSe

This patch adds better support for OpenSuSe by:
  * setting LIB_PREFIX correctly for OpenSuSe
  * adding checks before attempting to create sock file symlink

Change-Id: Ibf45a4284432f295cc575bbca93790c785059251
Merge "Update mysql element to work better with OpenSuSe"
Merge "Adds local storage Boot support on PXE failures."