Code to ensure BiosBootSeq is not set to same value as on server already.

This is an existing issue as specified by the LC team.  After exporting a server's config.xml, BiosBootSeq will be commented out, and adding the BiosBootSeq again will cause errors if the BiosBootSeq on the server is already set to what we want to set it to.

New code searches through comments in the xml to get what the server currently has set for BiosBootSeq, to see if BiosBootSeq should be added to the xml to be imported into the server.