DB: Fix DB update and set DB version to '0.1.7'.

src/Model/Pollutants/Pollutants.py

@@ -99,6 +99,11 @@ class Pollutants(SQLSubModel):
 
     @classmethod
     def _db_update(cls, execute, version, data=None):
+        major, minor, release = version.strip().split(".")
+        if major == "0" and int(minor) <= 1:
+            if int(release) < 7:
+                cls._db_create(execute)
+
         return True
 
     @classmethod