Add manila_sudoers file

All manila rootwrap calls are failing in
source build because lack of sudoer setting

Change-Id: I301fd7b6ff3721328828c2e0384f7e320146731b
Partially-Implements: blueprint enable-manila-containers

docker/manila/manila-base/Dockerfile.j2

@@ -19,6 +19,10 @@ RUN ln -s manila-base-source/* manila \
     && chown -R manila: /etc/manila /var/lib/manila /var/cache/manila /var/log/manila /home/manila \
     && sed -i 's|^exec_dirs.*|exec_dirs=/var/lib/kolla/venv/bin,/sbin,/usr/sbin,/bin,/usr/bin,/usr/local/bin,/usr/local/sbin|g' /etc/manila/rootwrap.conf
 
+COPY manila_sudoers /etc/sudoers.d/manila_sudoers
+RUN chmod 750 /etc/sudoers.d \
+    && chmod 440 /etc/sudoers.d/manila_sudoers
+
 {% endif %}
 
 RUN usermod -a -G kolla manila

docker/manila/manila-base/manila_sudoers

+manila ALL = (root) NOPASSWD: /var/lib/kolla/venv/bin/manila-rootwrap /etc/manila/rootwrap.conf *