Fix PLA relations, add missing ENVs, and include it in the bundle

Change-Id: I4d309d045404a900e04909c46196d32e43bb1862
Signed-off-by: David Garcia <david.garcia@canonical.com>
diff --git a/installers/charm/pla/config.yaml b/installers/charm/pla/config.yaml
index 92bb422..3f092c5 100644
--- a/installers/charm/pla/config.yaml
+++ b/installers/charm/pla/config.yaml
@@ -24,19 +24,15 @@
     description: Port number
     type: int
     default: 8080 # Fake port
-  kafka_host:
-    description: Kafka Hostname
-    type: string
-    default: kafka-k8s
-  kafka_port:
-    description: Kafka Port
-    type: int
-    default: 9092
-  mongo_uri:
-    description: Mongo URI
-    type: string
-    default: mongodb://mongodb-k8s:27017
   log_level:
     description: Log level
     type: string
     default: INFO
+  database:
+    description: Database name
+    type: string
+    default: pla
+  database_common_key:
+    description: Common Key for Mongo database
+    type: string
+    default: osm