Making all the changes to send nova CUF in the updated format

The changes in this commit are:
1)removed escape strings from the CUF message
2)changed the time format in the CUF according to AH time format
3)Fixed the bug where eventId in CUF was taken as _unique_id attribute in exists instead of the yagi-generated uuid
4)fixed the bug where data centre and region values were being exchanged.
5)added resourceName in the event.
6)implemented the new format of rax_options expansion.