[CARBONDATA-2119]deserialization issue for carbonloadmodel

Problem:
Load model was not getting de-serialized in the executor due to which 2 different carbon table objects were being created.
Solution:
Reconstruct carbonTable from tableInfo if not already created.

This closes #1947

processing/src/main/java/org/apache/carbondata/processing/loading/model/CarbonDataLoadSchema.java

@@ -57,7 +57,7 @@ public CarbonDataLoadSchema(CarbonTable carbonTable) {
    */
   public CarbonTable getCarbonTable() {
     if (!updatedDataTypes) {
-      CarbonTable.updateTableInfo(carbonTable.getTableInfo());
+      carbonTable = CarbonTable.buildFromTableInfo(carbonTable.getTableInfo());
       updatedDataTypes = true;
     }
     return carbonTable;