Revert "Update license headers"

This reverts commit 26a59aa402f743ad0903a2fd6993b0dfbe7e8bf4.
Fixes euca-9108 euca-9241 euca-9205.

Introduces a configuration cache and update for backend client.
Also introduces S3SecretKey encpryption in the db.

Introduces upgrade for walrus->OSG of bucket naming restrictions, max bucket count per account and
the reported max capacity.