Simplifying the User facing APIs in TyperUtils.

Simplifying the User facing APIs in TyperUtils.

Based on Ashwin's comment to the library infra gerrit (8104), more simplified User Facing APIs are introduced :
1. Bridge rBridge = ovs.createTypedRowWrapper(TestBridge.class);
   replaces
   TestBridge rBridge = TyperUtils.getTypedRowWrapper(dbSchema, TestBridge.class, new Row<GenericTableSchema>());

2. rBridge.getSchema()
   replaces
   GenericTableSchema rBridgeSchema = TyperUtils.getTableSchema(dbSchema, TestBridge.class);

More such Simplified alternative APIs will be added based on usage.

Change-Id: Ibdee07b308145bf792c9309d7095a94aac2d23b3
Signed-off-by: Madhu Venugopal <mavenugo@gmail.com>