Use unescapeSQLString instead of stripQuotes

Author: JoshRosen

sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala

@@ -882,7 +882,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
                 (rowFormat, None, Nil)
 
               case Token("TOK_SERDENAME", Token(serdeClass, Nil) :: Nil) :: Nil =>
-                (Nil, Some(PlanUtils.stripQuotes(serdeClass)), Nil)
+                (Nil, Some(BaseSemanticAnalyzer.unescapeSQLString(serdeClass)), Nil)
 
               case Token("TOK_SERDENAME", Token(serdeClass, Nil) ::
                 Token("TOK_TABLEPROPERTIES",
@@ -891,7 +891,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
                   case Token("TOK_TABLEPROPERTY", Token(name, Nil) :: Token(value, Nil) :: Nil) =>
                     (name, value)
                 }
-                (Nil, Some(PlanUtils.stripQuotes(serdeClass)), serdeProps)
+                (Nil, Some(BaseSemanticAnalyzer.unescapeSQLString(serdeClass)), serdeProps)
 
               case Nil => (Nil, None, Nil)
             }