[DOC] Fix some doc8 issues

- move doc8 dependency from docs/requirements-docs.txt to tox.ini
  since it is not needed by other tox profiles
- disable doc8 tox profile voting since linelength issues are not
  completely fixed yet
- fix a few linelength issues

Issue-ID: DOC-765

Signed-off-by: guillaume.lambert <guillaume.lambert@orange.com>
Change-Id: I704fc2ee8087ffbb8a83d693f6dc5a5f7c992b10
diff --git a/docs/oom_user_guide.rst b/docs/oom_user_guide.rst
index 3a707e2..5f63c7d 100644
--- a/docs/oom_user_guide.rst
+++ b/docs/oom_user_guide.rst
@@ -444,23 +444,24 @@
 
    | Alternatives Considered:
 
-   -  Kubernetes port forwarding was considered but discarded as it would require
-      the end user to run a script that opens up port forwarding tunnels to each of
-      the pods that provides a portal application widget.
+   -  Kubernetes port forwarding was considered but discarded as it would
+      require the end user to run a script that opens up port forwarding tunnels
+      to each of the pods that provides a portal application widget.
 
    -  Reverting to a VNC server similar to what was deployed in the Amsterdam
-      release was also considered but there were many issues with resolution, lack
-      of volume mount, /etc/hosts dynamic update, file upload that were a tall order
-      to solve in time for the Beijing release.
+      release was also considered but there were many issues with resolution,
+      lack of volume mount, /etc/hosts dynamic update, file upload that were
+      a tall order to solve in time for the Beijing release.
 
    Observations:
 
-   -  If you are not using floating IPs in your Kubernetes deployment and directly attaching
-      a public IP address (i.e. by using your public provider network) to your K8S Node
-      VMs' network interface, then the output of 'kubectl -n onap get services | grep "portal-app"'
+   -  If you are not using floating IPs in your Kubernetes deployment and
+      directly attaching a public IP address (i.e. by using your public provider
+      network) to your K8S Node VMs' network interface, then the output of
+      'kubectl -n onap get services | grep "portal-app"'
       will show your public IP instead of the private network's IP. Therefore,
-      you can grab this public IP directly (as compared to trying to find the floating
-      IP first) and map this IP in /etc/hosts.
+      you can grab this public IP directly (as compared to trying to find the
+      floating IP first) and map this IP in /etc/hosts.
 
 .. figure:: oomLogoV2-Monitor.png
    :align: right