Add filter function to allow filtering by list (with multiple countries)

ProcessorComponents.py

@@ -1079,11 +1079,17 @@ def process_in_job_survey(jobPath,status,config,component):
         #TODO : for Kenya data, provide a coordinate-based filter
         return
 
+    def filter_by_list(df,coln,values):
+        # CAUTION: This requires surveyor to provide the correct list of countries
+        df.drop(df.loc[~df[coln].isin(values)].index,inplace=True)
+        return
+
     func_types = {
         'add': add_column,
         'remove' : remove_column,
         'replace' : replace_column,
-        'filter' : filter_by_column
+        'filter' : filter_by_column,
+        'filter_by_list' : filter_by_list
     }
 
     # simple format alignment using edits on config