Update pip pin from 9.0.1 to 9.0.2
diff --git a/tools/dockerfile/test/php_jessie_x64/Dockerfile b/tools/dockerfile/test/php_jessie_x64/Dockerfile
index fb653d3..32a4b61 100644
--- a/tools/dockerfile/test/php_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/php_jessie_x64/Dockerfile
@@ -64,7 +64,7 @@
     python-pip
 
 # Install Python packages from PyPI
-RUN pip install --upgrade pip==9.0.1
+RUN pip install --upgrade pip==9.0.2
 RUN pip install virtualenv
 RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.5.0.post1 six==1.10.0 twisted==17.5.0