Adds use of OSMPOL_SQL_DATABASE_URI config param to connect to DB

The OSMPOL_SQL_DATABASE_URI was not being used by POL to connect
to the database. There was a hardcoded sqlite database name.
This change should now provide capability to the user to use any
SQL database engine supported by the peewee ORM (mysql/mariadb,
postgres, sqlite).

Signed-off-by: Benjamin Diaz <bdiaz@whitestack.com>
Change-Id: Iff406862fb3dfeb4453fb3213c94db6d62385d96
diff --git a/docker/Dockerfile b/docker/Dockerfile
index ab5b411..5953489 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -44,7 +44,7 @@
 ENV OSMPOL_DATABASE_HOST mongo
 ENV OSMPOL_DATABASE_PORT 27017
 
-ENV OSMPOL_SQL_DATABASE_URI sqlite:///mon_sqlite.db
+ENV OSMPOL_SQL_DATABASE_URI sqlite:///policy_module.db
 
 ENV OSMPOL_LOG_LEVEL INFO
 ENV OSMPOL_KAFKA_LOG_LEVEL WARN