[VOL-1667] Fix instance Id and other minor fixes

This commit fixes the following:

1) Remove the instance ID as an input parameter and let the code
sets it to hostname
2) Removes logs settings in the rw_core that were overwriting the
input parameter setting
3) Removes unnecessary device loading at creation time (applies to
the core in a core-pair that is only monitoring the transaction).
The device ID is not know by that Core at that time.
4) Some minor cleanups

Change-Id: If781103bfb449dcae5421284456c4b0fe67704fd
diff --git a/compose/rw_core.yml b/compose/rw_core.yml
index 6948546..4600b1a 100644
--- a/compose/rw_core.yml
+++ b/compose/rw_core.yml
@@ -32,8 +32,9 @@
         - -kv_store_data_prefix=service/voltha
         - -in_competing_mode=false
         - -timeout_long_request=3000
-        - -timeout_request=300
-        - -log_level=0
+        - -timeout_request=500
+        - -core_timeout=500
+        - -log_level=2
     ports:
       - 50057:50057
     volumes: