packaging: explicit jinja2 dependency for dashboard

We were getting this via python-flask, when mgr was
installed on nodes with ceph-mon, but for correctness
in general we should depend on it from ceph-mgr (it
is imported by the dashboard module).

Fixes: http://tracker.ceph.com/issues/22457
Signed-off-by: John Spray <john.spray@redhat.com>

ceph.spec.in

@@ -340,11 +340,13 @@ Group:          System/Filesystems
 Requires:       ceph-base = %{_epoch_prefix}%{version}-%{release}
 %if 0%{?fedora} || 0%{?rhel}
 Requires:       python-cherrypy
+Requires:       python-jinja2
 Requires:       python-werkzeug
 Requires:       pyOpenSSL
 %endif
 %if 0%{?suse_version}
 Requires: 	python-CherryPy
+Requires:       python-Jinja2
 Requires:       python-Werkzeug
 Requires:       python-pyOpenSSL
 Recommends:     python-influxdb

debian/control

@@ -51,6 +51,7 @@ Build-Depends: bc,
                python (>= 2.7),
                python-all-dev,
                python-cherrypy3,
+               python-jinja2,
                python-nose,
                python-pecan,
                python-prettytable,