[FAB-4208] proper UT for chaincode framework

Replaces the heavyweight chaincode framework tests that
need a full fledged peer and container env for testing with
a lightweight UT tests using a mock environment. The CC side
and some of the ledger interfaces are mocked.

Also disables other tests in the framework so the community
can get a feel for the coverage and speedup

. renamed cc_test.go to chaincode_support_test.go
. add some minor tests
. added some error refactoring in handler.go

Change-Id: I462f05f7a78b7b2cfbb20138a20c5c0ee45a9be4
Signed-off-by: Srinivasan Muralidharan <muralisr@us.ibm.com>

common/mocks/peer/mockccstream.go

@@ -44,7 +44,7 @@ type MockResponseSet struct {
 //and response to send (optional)
 type MockResponse struct {
 	RecvMsg *pb.ChaincodeMessage
-	RespMsg *pb.ChaincodeMessage
+	RespMsg interface{}
 }
 
 // MockCCComm implements the mock communication between chaincode and peer
@@ -60,6 +60,10 @@ type MockCCComm struct {
 	respSet     *MockResponseSet
 }
 
+func (s *MockCCComm) SetName(newname string) {
+	s.name = newname
+}
+
 //Send sends a message
 func (s *MockCCComm) Send(msg *pb.ChaincodeMessage) error {
 	s.sendStream <- msg
@@ -143,7 +147,17 @@ func (s *MockCCComm) respond(msg *pb.ChaincodeMessage) error {
 		}
 
 		if mockResp.RespMsg != nil {
-			err = s.Send(mockResp.RespMsg)
+			var ccMsg *pb.ChaincodeMessage
+			if ccMsg, _ = mockResp.RespMsg.(*pb.ChaincodeMessage); ccMsg == nil {
+				if ccMsgFunc, ok := mockResp.RespMsg.(func(*pb.ChaincodeMessage) *pb.ChaincodeMessage); ok && ccMsgFunc != nil {
+					ccMsg = ccMsgFunc(msg)
+				}
+			}
+
+			if ccMsg == nil {
+				panic("----no pb.ChaincodeMessage---")
+			}
+			err = s.Send(ccMsg)
 		}
 
 		s.respIndex = s.respIndex + 1