Add configurable http_timeout parameter for Cisco N1K

http_timeout is a constant defined in the code. This
change makes it configurable by providing it as an
option in the config file.

DocImpact

Closes-Bug: #1332290
Change-Id: I429dd9efa43f6a596933359f4627a7761411e621
Imported Translations from Transifex

Change-Id: I194cb4f511cf05b70f2bffaeb3d4daee24e46993
Updated from global requirements

Change-Id: If26b2e9b875f8cae0af1cf66607ef1efb8dd429c
Merge "Add configurable http_timeout parameter for Cisco N1K"
Merge "Updated from global requirements"
Merge "Imported Translations from Transifex"