Fix build dependencies

Forces tox recreate to expose missing dependencies.
Adds wget to dockerfile for make IM to complete.

Change-Id: Ic01c91c06123c76989b96002b07788117e6f67e4
Signed-off-by: beierlm <mark.beierl@canonical.com>
diff --git a/Dockerfile b/Dockerfile
index ef0175a..8c16461 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,4 +16,4 @@
 RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -y install git \
     make python3 python3-pip libcurl4-openssl-dev libssl-dev tox python3-dev \
     debhelper python3-setuptools python3-all python-all python-pip \
-    apt-utils
+    apt-utils wget