Update Dockerfiles to install juju module

Update the LCM and MON dockerfiles to install the upstream juju library
from pip.

Change-Id: I9dc31a852cd29c13cf04e39dfb116f9950f475fd
Signed-off-by: Adam Israel <adam.israel@canonical.com>
diff --git a/docker/MON/Dockerfile b/docker/MON/Dockerfile
index 26a74e6..96e1633 100644
--- a/docker/MON/Dockerfile
+++ b/docker/MON/Dockerfile
@@ -40,9 +40,7 @@
     && rm -rf /var/lib/apt/lists/* \
     && pip3 install pip==9.0.3
 
-RUN pip3 install  'macaroonbakery>=1.1,<2.0' 'pyRFC3339>=1.0,<2.0' \
-      'pyyaml>=5.1.2' 'theblues>=0.3.8,<1.0' 'websockets>=4.0,<5.0' \
-      'paramiko'   # PyNaCl
+RUN pip3 install juju
 
 ARG REPOSITORY_BASE=http://osm-download.etsi.org/repository/osm/debian
 ARG RELEASE=ReleaseFOUR-daily