SEBA-497 delayering, Makefile, and tox for onos-synchronizer

Change-Id: I849b307330a6fd5a5de5489d8f2db804a02acead
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 0b24cbf..8340881 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -16,7 +16,15 @@
 
 # xosproject/onos-synchronizer
 
-FROM xosproject/xos-synchronizer-base:2.2.18
+FROM xosproject/alpine-grpc-base:0.9.0
+
+# Install pip packages
+COPY requirements.txt /tmp/requirements.txt
+RUN pip install -r /tmp/requirements.txt \
+ && pip freeze > /var/xos/pip_freeze_onos_service_`date -u +%Y%m%dT%H%M%S`
+ 
+
+# Copy files
 COPY xos/synchronizer /opt/xos/synchronizers/onos
 COPY VERSION /opt/xos/synchronizers/onos/