Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1294676
Description of problem:
Timeout when trying to list the VMs in a RHEV compute resource.

Version-Release number of selected component (if applicable):
ruby193-rubygem-rbovirt-0.0.29-1.el7sat

How reproducible:
Always

Steps to Reproduce:
1. Add a RHEV compute resource with a large number of VMs
2. Try to view the list of VMs in the RHEV compute resource
3.

Actual results:
- Web ui displays "There was an error listing VMs: Request Timeout".

- /var/log/foreman/production.log shows the request is timing out after 60 seconds:

2015-12-29 09:29:00 [D] RestClient.get "https://rhevm.example.com/api/datacenters/f4f8fd40-452c-4042-8152-4d5dc84a764c", "Accept"=>"application/xml", "Accept-Encoding"=>"gzip, deflate", "Authorization"=>"Basic xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", "Content-Type"=>"application/xml"

2015-12-29 09:29:00 [D] # => 200 OK | application/xml 379 bytes

2015-12-29 09:29:00 [D] RestClient.get "https://rhevm.example.com/api/vms?search=datacenter%3DRHEV-DC", "Accept"=>"application/xml; detail=disks; detail=nics; detail=hosts", "Accept-Encoding"=>"gzip, deflate", "Authorization"=>"Basic xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", "Content-Type"=>"application/xml"

2015-12-29 09:30:01 [W] Error has occurred while listing VMs on RHEV-DC (RHEV): Request Timeout

Expected results:
The VMs are listed.

Additional info:
rbovirt seems to be inheriting the default timeout from Net::HTTP .
In file /usr/share/ruby/net/http.rb:

630     # Creates a new Net::HTTP object for the specified server address,
  631     # without opening the TCP connection or initializing the HTTP session.

633     def initialize(address, port = nil)

645       @read_timeout = 60