Revert "Fixed bug with fetching deployment information in"

This reverts commit 08d792e3b3524e1c9d646f9546ea55499148d71e.
Revert "Adding host and deployment info to missing exists entries in the nova usage audit"

This reverts commit 60be387b978cb32a8367589051ff5065ca10b79b.
Revert "Added column headers for host and deployment in json reports"

This reverts commit 00bcb9011772efec126f3af28fc701345472889c.
Merge pull request #324 from manalilatkar/null_request_id_fix

Null request id fix