import_geiq: cast the SIRET to integer before casting to string

In the XLS, the SIRET can be of type float. When casted to string,
trailing `.0`s appear. Casting to int before str prevents this.

itou/companies/management/commands/import_geiq.py

@@ -16,6 +16,16 @@
 from itou.utils.validators import validate_siret
 
 
+def clean_string_siret(s):
+    """
+    Sometimes the SIRET is saved as float in xls file.
+    Here we force the format to 14 characters.
+    """
+    if s is None:
+        return None
+    return clean_string(int(s))
+
+
 @timeit
 def get_geiq_df(filename):
     info_stats = {}
@@ -43,7 +53,7 @@ def get_geiq_df(filename):
     df["address_line_2"] = df.address_line_2.apply(clean_string)
     df["post_code"] = df.post_code.apply(clean_string)
     df["city"] = df.city.apply(clean_string)
-    df["siret"] = df.siret.apply(clean_string)
+    df["siret"] = df.siret.apply(clean_string_siret)
     df["auth_email"] = df.auth_email.apply(clean_string)
 
     # "GEIQ PROVENCE" becomes "Geiq Provence".