lib/database: Fixed a bug in database_connection_url

The changes from https://review.openstack.org/#/c/23364/ simplified
the usage of database_connection_url_mysql and
database_connection_url_postgresql without making the proper changes
to database_connection_url.

Fixes: bug #1167668
Signed-off-by: Tal Kain <tal.kain@ravellosystems.com>
Change-Id: I5115d123ad794f2eb2e144b76932031af5248f26
diff --git a/lib/database b/lib/database
index e63d5e2..442ed56 100644
--- a/lib/database
+++ b/lib/database
@@ -38,7 +38,7 @@
 for db in $DATABASE_BACKENDS; do
     # Set the type for the rest of the backend to use
     if is_service_enabled $db; then
-        # Set this now for the rest of the database funtions
+        # Set this now for the rest of the database functions
         DATABASE_TYPE=$db
     fi
 done
@@ -110,13 +110,11 @@
     configure_database_$DATABASE_TYPE
 }
 
-# Generate an SQLAlchemy connection URL and store it in a variable
-#  $1 The variable name in which to store the connection URL
-#  $2 The name of the database
+# Generate an SQLAlchemy connection URL and output it using echo
+#  $1 The name of the database
 function database_connection_url {
-    local var=$1
-    local db=$2
-    database_connection_url_$DATABASE_TYPE $var $db
+    local db=$1
+    database_connection_url_$DATABASE_TYPE $db
 }