[SPARK-18681][SQL] Fix filtering to compatible with partition keys of type int

## What changes were proposed in this pull request?

Cloudera put `/var/run/cloudera-scm-agent/process/15000-hive-HIVEMETASTORE/hive-site.xml` as the configuration file for the Hive Metastore Server, where `hive.metastore.try.direct.sql=false`. But Spark isn't reading this configuration file and get default value `hive.metastore.try.direct.sql=true`. As mallman said, we should use `getMetaConf` method to obtain the original configuration from Hive Metastore Server. I have tested this method few times and the return value is always consistent with Hive Metastore Server.

## How was this patch tested?

The existing tests.

Author: Yuming Wang <wgyumg@gmail.com>

Closes #16122 from wangyum/SPARK-18681.

sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveShim.scala

@@ -594,8 +594,11 @@ private[client] class Shim_v0_13 extends Shim_v0_12 {
       } else {
         logDebug(s"Hive metastore filter is '$filter'.")
         val tryDirectSqlConfVar = HiveConf.ConfVars.METASTORE_TRY_DIRECT_SQL
-        val tryDirectSql =
-          hive.getConf.getBoolean(tryDirectSqlConfVar.varname, tryDirectSqlConfVar.defaultBoolVal)
+        // We should get this config value from the metaStore. otherwise hit SPARK-18681.
+        // To be compatible with hive-0.12 and hive-0.13, In the future we can achieve this by:
+        // val tryDirectSql = hive.getMetaConf(tryDirectSqlConfVar.varname).toBoolean
+        val tryDirectSql = hive.getMSC.getConfigValue(tryDirectSqlConfVar.varname,
+          tryDirectSqlConfVar.defaultBoolVal.toString).toBoolean
         try {
           // Hive may throw an exception when calling this method in some circumstances, such as
           // when filtering on a non-string partition column when the hive config key