[6683] Removing unnecessary files and update gitignore

VOL-507, VOL-463: Protobuf upgrade to 3.3 and Chameleon Removal

Update the Protobuf version from 3.1 to 3.3 to alleviate
a protobuf issue when loading protobuf extensions.  The following
tests have been performed:
- Create a local Vagrant VM
- Voltha ensemble startup and check for errors/exceptions
- Manual compilations of the protos in voltha, ofagent, netconf and
chameleon directory
- Manual tests with ONOS/Voltha/Ponsim using Netconf, Curl and CLI
- Run the integration tests (known issues have Jiras already raised
against them.
- Run the make jenkins-test and make utest-with-coverage

Chameleon has been removed entirely from Voltha projects. Basic tests
have run to verify chameleon dependency has been removed.  Some
documents (like README) will need to be changed under a separate Jiras
as they are referenced in different adapters.  Some integration tests
will also need to be updated as well.

Change-Id: I2b266719a6825fb07ece3a79f7f81881ab3b9761
diff --git a/ofagent/protos/Makefile b/ofagent/protos/Makefile
index 9b042e9..c6f5d8c 100644
--- a/ofagent/protos/Makefile
+++ b/ofagent/protos/Makefile
@@ -23,15 +23,21 @@
 # This makefile is used only to copy relevant *_pb2.py files from Voltha
 # to allow ofagent to function properly.
 
-PB2_FILES := \
-    voltha_pb2.py \
-    openflow_13_pb2.py
 
 TARGET_PROTO_DIR := $(VOLTHA_BASE)/ofagent/protos
 SOURCE_PROTO_DIR := $(VOLTHA_BASE)/voltha/protos
+TARGET_GOOGLE_API_DIR := $(TARGET_PROTO_DIR)/third_party/google/api
+SOURCE_GOOGLE_API_DIR := $(SOURCE_PROTO_DIR)/third_party/google/api
 
 build: copyfiles
 
 copyfiles:
 	rsync -av --include '*/' --exclude='third_party/__init__.py' --include '*.py' --exclude='*' $(SOURCE_PROTO_DIR)/ $(TARGET_PROTO_DIR)
+	rsync -av --include '*/' --exclude='third_party/__init__.py' --include '*.py' --include '*.desc' --include '*.proto' --exclude='*' $(SOURCE_GOOGLE_API_DIR)/ $(TARGET_GOOGLE_API_DIR)
 
+clean:
+	rm -f $(TARGET_PROTO_DIR)/*_pb2*.py
+	rm -f $(TARGET_GOOGLE_API_DIR)/*_pb2*.py
+	rm -f $(TARGET_GOOGLE_API_DIR)/*_pb2*.pyc
+	rm -f $(TARGET_GOOGLE_API_DIR)/*.proto
+	rm -f $(TARGET_GOOGLE_API_DIR)/*.desc