Fix permission for /var/log/kolla folder

Docker will change the name volume folder permission to image already
set. /var/log/kolla is not created and well configured in image.

This patch set creates and configures proper permission /var/log/kolla
in base image.
This patch set also fixed the ceph image by adding ceph user to kolla
group.

TrivialFix

Change-Id: Ib5ef0187e90de2699b3cda31e819b4babb07e0af

docker/base/Dockerfile.j2

@@ -282,6 +282,9 @@ RUN touch /usr/local/bin/kolla_extend_start \
     && chmod 755 /usr/local/bin/kolla_start /usr/local/bin/kolla_extend_start /usr/local/bin/kolla_set_configs \
     && chmod 440 /etc/sudoers \
     && groupadd kolla \
+    && mkdir -p /var/log/kolla \
+    && chown :kolla /var/log/kolla \
+    && chmod 2775 /var/log/kolla \
     && rm -f /tmp/kolla_bashrc \
     && curl -sSL https://github.com/Yelp/dumb-init/releases/download/v1.1.3/dumb-init_1.1.3_amd64 -o /usr/local/bin/dumb-init \
     && chmod +x /usr/local/bin/dumb-init

docker/ceph/ceph-base/Dockerfile.j2

@@ -25,7 +25,8 @@ MAINTAINER {{ maintainer }}
 {{ macros.install_packages(ceph_base_packages | customizable("packages")) }}
 
 COPY extend_start.sh /usr/local/bin/kolla_extend_start
-RUN chmod 755 /usr/local/bin/kolla_extend_start
+RUN chmod 755 /usr/local/bin/kolla_extend_start \
+    && usermod -a -G kolla ceph
 
 {% block ceph_base_footer %}{% endblock %}
 {% block footer %}{% endblock %}