Bump MAX_VERSION to 3.64 to support including the encryption_key_id
attribute in volume and backup details.
Implements: blueprint include-encryption-key-id-in-details
Depends-On: I16f54e6722cdbcbad4af1eb0d30264b0039412fd
Change-Id: I6e1f3ff62d4b7b9b8299f7bd73071c3c7856f6df