Stop creating a keystone admin site

Keystone no longer has any special functionality hidden behind the admin
site. KEYSTONE_AUTH_URI which used to point to the admin site has long
ago been changed to be a copy of KEYSTONE_SERVICE_URI, which points to
the public site.

Drop all KEYSTONE_AUTH_* variables except KEYSTONE_AUTH_URI which may
still be in use in some plugins.

This also allows to finally drop the fixup_keystone() function.

Change-Id: I549f3cadc27d137e014241cdd47e90267859c848
diff --git a/lib/swift b/lib/swift
index 9885241..b376993 100644
--- a/lib/swift
+++ b/lib/swift
@@ -430,7 +430,7 @@
         swift_pipeline+=" authtoken"
         if is_service_enabled s3api;then
             swift_pipeline+=" s3token"
-            iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:s3token auth_uri ${KEYSTONE_AUTH_URI_V3}
+            iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:s3token auth_uri ${KEYSTONE_SERVICE_URI_V3}
             iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:s3token delay_auth_decision true
         fi
         swift_pipeline+=" keystoneauth"
@@ -521,7 +521,7 @@
         local auth_vers
         auth_vers=$(iniget ${testfile} func_test auth_version)
         iniset ${testfile} func_test auth_host ${KEYSTONE_SERVICE_HOST}
-        if [[ "$KEYSTONE_AUTH_PROTOCOL" == "https" ]]; then
+        if [[ "$KEYSTONE_SERVICE_PROTOCOL" == "https" ]]; then
             iniset ${testfile} func_test auth_port 443
         else
             iniset ${testfile} func_test auth_port 80