Update dockerfile to run on Ubuntu 18.04
diff --git a/requirements.txt b/requirements.txt
index 74d28c4..d6adebf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,26 +1,27 @@
 decorator
+ecdsa
 futures
+ipython
+iso8601
+matplotlib
 netaddr
+numpy
+oktest
 paramiko
 petname
 prest
 prettytable
+psutil
+psutil
+pycrypto
+pytest
+python-cinderclient
+python-glanceclient
+python-keystoneclient
+python-novaclient
 PyYAML
 requests
-simplejson
-pycrypto
-ecdsa
-psutil
-python-novaclient
-python-cinderclient
-python-keystoneclient
-python-glanceclient
-oktest
-iso8601
 scipy
-numpy
-matplotlib
-psutil
 seaborn
-pytest
-statsmodels
+simplejson
+statsmodels
\ No newline at end of file