Revert keyrock to 8.3.0

see ging/fiware-idm#340

Author: jason-fox

.env

@@ -19,7 +19,7 @@ ULTRALIGHT_VERSION=2.2.0-distroless
 IOTA_NORTH_PORT=4041
 
 # Keyrock variables
-KEYROCK_VERSION=8.4.0-distroless
+KEYROCK_VERSION=8.3.0-distroless
 KEYROCK_PORT=3005
 KEYROCK_HTTPS_PORT=3443