Starting with opsrofiler 0.3.1 release there is no need to set HMAC_KEYS
and ENABLED arguments in the glance-api-paste.ini and
glance-registry-paste.ini files, this can be set in glance-api.conf and
glance-registry.conf configuration files.
DocImpact
Change-Id: I068504913c93be0f506262930eadc2e40879ce0f