Cosmetic documentation changes.

howto/accounts.rst
howto/ssh_access.rst
--------------------
  o Fix gerrit port, should be 29418 VS 29419
  o Mention the 'AddKeysToAgent' attribute, useful option.

howto/docs.voltha.org/quickstart.rst
------------------------------------
  o Remove blank lines
  o Separate list items with comma.

Change-Id: I197fd1ebf71609791dddeb41e42c738317ac6b68
diff --git a/howto/accounts.rst b/howto/accounts.rst
index fba75ba..c95f12f 100644
--- a/howto/accounts.rst
+++ b/howto/accounts.rst
@@ -41,10 +41,10 @@
    $ ssh-keygen -t ed25519 -f id_gerrit -C 'tux@opennetworking.org'
 
    # Connect passing -T, -p(ort), -i(dentity)
-   $ ssh -T -p 29419 -i ~/.ssh/id_gerrit 'tux@opennetworking.org@gerrit.opencord.org'
+   $ ssh -T -p 29418 -i ~/.ssh/id_gerrit 'tux@opennetworking.org@gerrit.opencord.org'
 
    $ ssh-add ~/.ssh/id_gerrit
-   $ ssh -T -p 29419 'tux@opennetworking.org@gerrit.opencord.org'
+   $ ssh -T -p 29418 'tux@opennetworking.org@gerrit.opencord.org'