[Vcloud] Server reset instance vars after save

New networking support needs to reset the stored update value after a save is completed
Stop hardcoding the server ssh port.
Use passed blocks to handle scp callbacks.
Merge pull request #1655 from calavera/fix_server_ssh_port

Stop hardcoding the server's ssh port.
[rackspace] fixing constant already defined error for Fog::Rackspace::UK_AUTH_ENDPOINT and Fog::Rackspace::US_AUTH_ENDPOINT
Merge pull request #1657 from rackspace/constant_fix

[rackspace] fixing constant already defined error
Merge pull request #1654 from dJason/patch-3

[Vcloud] Server reset instance vars after save
Merge pull request #1656 from calavera/add_scp_data_handlers

Add block handlers for SCP
Forcing good Excon version
Merge pull request #1658 from dlibanori/master

Forcing good version of Excon
Remove unecessary print
Added Content-Disposition attribute for Rackspace file
Merge pull request #1660 from chirag-jog/master

Remove unnecessary print statement
Merge pull request #1662 from snoopie/master

Allow passing Content-Disposition header when saving file into Rackspace cloud
Removed Zerigo::Models::DNS::Records#find method, moved functionality to all(options)
Removed Rackspace::Models::DNS::Zones#find, moved functionality to all(options)
fixed infinite loop in each method of AWS Distributions
add a test to protect certain Enumerable methods in Fog::Collection subclasses
[hp|storage] marker option in each method needs to be a string
Merge pull request #1661 from helle/enumerable_fixes

Enumerable fixes