Reformat POL to standardized format

Change-Id: I955a76830f582b6d152e242568d74a12907c782c
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/osm_policy_module/migrations/001_initial.py b/osm_policy_module/migrations/001_initial.py
index 257a06c..d6f572c 100644
--- a/osm_policy_module/migrations/001_initial.py
+++ b/osm_policy_module/migrations/001_initial.py
@@ -76,8 +76,13 @@
         name = pw.CharField(max_length=255)
         cooldown_time = pw.IntegerField()
         last_scale = pw.DateTimeField()
-        scaling_group = pw.ForeignKeyField(backref='scaling_policies', column_name='scaling_group_id', field='id',
-                                           model=migrator.orm['scalinggroup'], on_delete='CASCADE')
+        scaling_group = pw.ForeignKeyField(
+            backref="scaling_policies",
+            column_name="scaling_group_id",
+            field="id",
+            model=migrator.orm["scalinggroup"],
+            on_delete="CASCADE",
+        )
 
         class Meta:
             table_name = "scalingpolicy"
@@ -86,8 +91,13 @@
     class ScalingCriteria(pw.Model):
         id = pw.AutoField()
         name = pw.CharField(max_length=255)
-        scaling_policy = pw.ForeignKeyField(backref='scaling_criterias', column_name='scaling_policy_id', field='id',
-                                            model=migrator.orm['scalingpolicy'], on_delete='CASCADE')
+        scaling_policy = pw.ForeignKeyField(
+            backref="scaling_criterias",
+            column_name="scaling_policy_id",
+            field="id",
+            model=migrator.orm["scalingpolicy"],
+            on_delete="CASCADE",
+        )
 
         class Meta:
             table_name = "scalingcriteria"
@@ -99,8 +109,13 @@
         action = pw.CharField(max_length=255)
         vnf_member_index = pw.IntegerField()
         vdu_name = pw.CharField(max_length=255)
-        scaling_criteria = pw.ForeignKeyField(backref='scaling_alarms', column_name='scaling_criteria_id', field='id',
-                                              model=migrator.orm['scalingcriteria'], on_delete='CASCADE')
+        scaling_criteria = pw.ForeignKeyField(
+            backref="scaling_alarms",
+            column_name="scaling_criteria_id",
+            field="id",
+            model=migrator.orm["scalingcriteria"],
+            on_delete="CASCADE",
+        )
 
         class Meta:
             table_name = "scalingalarm"
@@ -109,12 +124,12 @@
 def rollback(migrator, database, fake=False, **kwargs):
     """Write your rollback migrations here."""
 
-    migrator.remove_model('scalingalarm')
+    migrator.remove_model("scalingalarm")
 
-    migrator.remove_model('scalingcriteria')
+    migrator.remove_model("scalingcriteria")
 
-    migrator.remove_model('scalingpolicy')
+    migrator.remove_model("scalingpolicy")
 
-    migrator.remove_model('scalinggroup')
+    migrator.remove_model("scalinggroup")
 
-    migrator.remove_model('basemodel')
+    migrator.remove_model("basemodel")