Exclude the test codes from source release. (apache#3509)

* Exclude the test codes from source release.

* Don't depend on antd anyway.

LICENSE

@@ -233,12 +233,3 @@ The text of each license is also included at licenses/LICENSE-[project].txt.
    proto files from gogo: https://github.com/gogo/protobuf  BSD-2
    proto files from grpc-gateway, https://github.com/grpc-ecosystem/grpc-gateway/tree/master/protoc-gen-swagger/options BSD-3
 
-
-========================================================================
-MIT licenses
-========================================================================
-
-The following components are provided under the MIT License. See project link for details.
-The text of each license is also included at licenses/LICENSE-[project].txt.
-
-   iconfont(from antd): https://github.com/ant-design/antd-init/tree/master/examples/local-iconfont   MIT

tools/releasing/create_source_release.sh

@@ -63,7 +63,9 @@ cd ..
 tar czf ${PRODUCT_NAME}-src.tgz \
     --exclude ${PRODUCT_NAME}/.git/ --exclude ${PRODUCT_NAME}/.DS_Store/ \
     --exclude ${PRODUCT_NAME}/.github/ --exclude ${PRODUCT_NAME}/.gitignore/ \
-    --exclude ${PRODUCT_NAME}/.gitmodules/ --exclude ${PRODUCT_NAME}/.travis.yml \
+    --exclude ${PRODUCT_NAME}/.gitmodules/ \
+    --exclude ${PRODUCT_NAME}/test/ \
+    --exclude ${PRODUCT_NAME}/tools/ \
     --exclude ${PRODUCT_NAME}/skywalking-ui/.git/ --exclude ${PRODUCT_NAME}/skywalking-ui/.DS_Store/ \
     --exclude ${PRODUCT_NAME}/skywalking-ui/.github/ --exclude ${PRODUCT_NAME}/skywalking-ui/.gitignore/ \
     --exclude ${PRODUCT_NAME}/skywalking-ui/.travis.yml/ \