Fix numpy usage on the master node

Note that slave nodes will not be able to use numpy since the makefile is only executed on the master node. The numpy wheel was compiled with this dependency available, it is unclear if we can compile it without this system package dependency. If we figure out a way to do this, we can re-compile the wheel and revert this change.

Change-Id: I01bbc96aecd2fc0bf08c0466550033d0db15aacd

Makefile

@@ -15,7 +15,8 @@ develop: requirements
 
 system-requirements:
 	sudo apt-get update -q
-	sudo apt-get install -y -q libmysqlclient-dev
+	# This is not great, we can't use these libraries on slave nodes using this method.
+	sudo apt-get install -y -q libmysqlclient-dev libatlas3gf-base
 
 requirements:
 	$(PIP_INSTALL) -U -r requirements/default.txt