Bump the ansible version to >2 in the kolla-toolbox

Kolla do not depend on certain version of Ansible. So
install the ansible using pip

Change-Id: Id1bf103a1f5c2a1cde653d53110f28c903ae8768
Partial-Implements: blueprint ansible2

docker/kolla-toolbox/Dockerfile.j2

@@ -36,17 +36,12 @@ RUN curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py \
     && rm get-pip.py \
     && pip --no-cache-dir install pytz \
     && pip --no-cache-dir install \
+        'ansible>2' \
         MySQL-python \
         os-client-config==1.16.0 \
         pyudev \
         shade==1.4.0
 
-RUN git clone https://github.com/ansible/ansible.git \
-    && cd ansible \
-    && git checkout 89569d035ea5002302a0a6b03451a4963fd83eb3 \
-    && git submodule update --init --recursive \
-    && pip --no-cache-dir install .
-
 RUN useradd --user-group ansible --groups kolla \
     && mkdir -p /etc/ansible /usr/share/ansible \
     && echo 'localhost ansible_connection=local' > /etc/ansible/hosts \