Description of problem:
Seen in master.

Steps to Reproduce:
1.  Create a system in the UI, but leave sockets completely blank.
2.  A pop up will say that the system did not match search critera 
3.  Refreshing the page will not show the system.
  

I believe the cause is in system.rb:

indexes :sockets, :type => 'integer'


I think that via the UI an empty string is being passed to it when that field is blank, which is not an integer.