Add libpython2.7

This gets pulled in for uwsgi

Depends-On: I4e222cb619b741cccf3ba1dfc29d86ea35e16fce
Change-Id: I7ffdb818f94c68e7e52a468f681c90a6704d71e2

centos/Dockerfile

@@ -14,6 +14,7 @@ ADD $OVERRIDE /
 RUN set -x \
     && yum upgrade -y \
     && yum install -y git \
+        libpython2.7 \
         libvirt0 \
         libxml2 \
         openvswitch \

debian/Dockerfile

@@ -16,6 +16,7 @@ RUN set -x \
     && apt-get dist-upgrade -y \
     && apt-get install -y --no-install-recommends git \
         ca-certificates \
+        libpython2.7 \
         libvirt0 \
         libxml2 \
         openvswitch-switch \

ubuntu/Dockerfile

@@ -16,6 +16,7 @@ RUN set -x \
     && apt-get dist-upgrade -y \
     && apt-get install -y --no-install-recommends git \
         ca-certificates \
+        libpython2.7 \
         libvirt0 \
         libxml2 \
         openvswitch-switch \