Add Stackdriver Profiler Python agent (#176)

* Add Stackdriver Profiler Python agent to EmailService and
RecommendationService

* Update recommendation_server.py

* Moved Profiler init to a function

* Moved Profiler init to a function

* Delete key.json

* Delete key.json

* Delete key.json

src/recommendationservice/Dockerfile

@@ -1,6 +1,6 @@
 FROM python:2.7-slim
 RUN apt-get update -qqy && \
-	apt-get -qqy install wget && \
+	apt-get -qqy install wget g++ && \
 	rm -rf /var/lib/apt/lists/*
 # show python logs as they occur
 ENV PYTHONUNBUFFERED=0