Currently, logs display the hash values of X-Auth-Token,
Authorization, and X-Subject-Token, but not the value of
the X-Service-Token. This patch set adds the X-Service-Token
to the list of header fields to be hashed for logging purposes.
Change-Id: Iaa3a27f4b6c3baf964fa0c71328ffe9df43b2c0a
Closes-Bug: #1654847