[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/tests/itests/docutests/build_md_test.py b/tests/itests/docutests/build_md_test.py
index 4e6c2d9..133736e 100644
--- a/tests/itests/docutests/build_md_test.py
+++ b/tests/itests/docutests/build_md_test.py
@@ -414,7 +414,7 @@
             # the list obtained from docker composed
             print "Verify all services are registered in consul ..."
             expected_services = ['consul-rest', 'fluentd-intake',
-                                 'chameleon-rest', 'voltha-grpc',
+                                 'voltha-grpc',
                                  'voltha-health',
                                  'consul-8600', 'zookeeper', 'consul',
                                  'kafka']
@@ -484,7 +484,7 @@
                   "..."
             expected_output = ['voltha_1', 'fluentd_1', 'consul_1',
                                'registrator_1', 'kafka_1', 'zookeeper_1',
-                               'chameleon_1', 'ofagent_1', 'netconf_1']
+                               'ofagent_1', 'netconf_1']
             cmd = command_defs['docker_compose_logs']
             docker_compose_logs = run_long_running_command_with_timeout(cmd, 5,
                                                                         0)