Show users exactly what will be updated so they can decide to go forward

[akarasulu]

Right now I see that after a fresh installation of a peer the System->Updates area shows that an update is available when I press the Update button. @soffokl told me this was due to other things that are updated like packages etc because an apt-get update and apt-get upgrade is also performed.

So as a user I feel something is wrong with this update mechanism because I feel like I have installed the latest version and this is happening. I think we need to report what will be updated to the user. Also after the update we need to show a log of the updates. Not just the one liner in the table that says "other system components updated". I understand that the RH and our software was not updated but other things were, however this is not what other users will think.

We can modify how this works easily. First of all when doing the update we should tee the output on the RH to a file which we can send back and display to the user. Secondly we need to show what will be upgraded exactly so the administrator knows what's up. This might require some changes to the agent but they should be small and a good starter task for the new agent peeps.

[akarasulu]

As can be seen from the screenshot, other system components are updated. What were they? Admins will want to know. Our users are not Windows users comfortable with just getting an update they know nothing about.

[dilshat]

Related #1814

[dilshat]

Blocked by optdyn/hub#2997