Systemd units, limits, and bin path fixes

* Add restart for weave service unit
* Reuse docker_bin_dir everythere
* Limit systemd managed docker containers by CPU/RAM. Do not configure native
  systemd limits due to the lack of consensus in the kernel community
  requires out-of-tree kernel patches.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

scripts/collect-info.yaml

@@ -10,7 +10,7 @@
       - name: kernel_info
         cmd: uname -r
       - name: docker_info
-        cmd: docker info
+        cmd: "{{ docker_bin_dir }}/docker info"
       - name: ip_info
         cmd: ip -4 -o a
       - name: route_info
@@ -34,9 +34,11 @@
       - name: weave_info
         cmd: weave report
       - name: weave_logs
-        cmd: docker logs weave
+        cmd: "{{ docker_bin_dir }}/docker logs weave"
       - name: kube_describe_all
         cmd: kubectl describe all --all-namespaces
+      - name: kube_describe_nodes
+        cmd: kubectl describe nodes
       - name: kubelet_logs
         cmd: journalctl -u kubelet --no-pager
       - name: kubedns_logs