Fixed job execution update in case of proxy command

Neutron info is required for proxy command template parameters.

Change-Id: Icc3d71a1d9ed28855dbe27f7e10fdd48ccc8f455
Closes-Bug: #1390276
Adds doc to devref quickstart document

The SAHARA_URL was not defined in the devref quickstart document. This
is added by this patch.

Closes-Bug: 1388143

Change-Id: I7094b77ed24dda3aaa190452392c6f03d16c0675
Merge "Adds doc to devref quickstart document"
Merge "Fixed job execution update in case of proxy command"
adding sahara-doc command

Change-Id: I2d457b984b9bba87c9705812e0b6a68e8c312bc5