HI Duration correction and synonyms addition (facebook#319)

Summary:
Pakhwada (पखवाड़ा) is 15 days not a fortnight, corrected that logic and added new synonyms and rules for other time grains.
Pull Request resolved: facebook#319

Reviewed By: chinmay87

Differential Revision: D13785950

Pulled By: girifb

fbshipit-source-id: 2e38ac2f1486ca8891ca561c0cb87141f5bfc1cd

Duckling/Duration/HI/Corpus.hs

@@ -36,6 +36,7 @@ allExamples = concat
   , examples (DurationData 1 Day)
              [ "दिवस"
              , "एक दिन"
+             , "बिल्कुल एक दिन"
              ]
   , examples (DurationData 14 Day)
              [ "पखवाड़ा"
@@ -45,5 +46,7 @@ allExamples = concat
              [ "एक साल"
              , "केवल एक वर्ष"
              , "लगभग एक साल"
+             , "एक बरस"
+             , "केवल एक साल"
              ]
   ]

Duckling/Duration/HI/Rules.hs

@@ -33,19 +33,23 @@ import qualified Duckling.TimeGrain.Types as TG
 avadhiMap :: HashMap Text TG.Grain
 avadhiMap = HashMap.fromList
   [ ("मिनट" , TG.Minute)
+  , ("क्षण", TG.Minute)
   , ("घंटा" , TG.Hour)
   , ("दिवस" , TG.Day)
   , ("दिन"  , TG.Day)
   , ("महीना", TG.Month)
+  , ("माह", TG.Month)
+  , ("मास", TG.Month)
   , ("वर्ष" , TG.Year)
   , ("साल"  , TG.Year)
+  , ("बरस", TG.Year)
   ]
 
 ruleAadha :: Rule
 ruleAadha = Rule
   { name = "half of a duration"
   , pattern =
-    [ regex "आधा ((साल|वर्ष)|(महीना)|(दिन|दिवस)|(घंटा)|(मिनट))"
+    [ regex "आधा ((साल|वर्ष|बरस)|(महीना|मास|माह)|(दिन|दिवस)|(घंटा)|(मिनट|क्षण))"
     ]
   , prod = \tokens -> case tokens of
       (Token RegexMatch (GroupMatch (x:_)):_) -> do
@@ -85,7 +89,7 @@ ruleDurationEkSaal :: Rule
 ruleDurationEkSaal = Rule
   { name = "one year"
   , pattern =
-    [ regex "एक (साल|वर्ष)"
+    [ regex "एक (साल|वर्ष|बरस)"
     ]
   , prod = \_ -> Just . Token Duration $ duration TG.Year 1
   }