OS-500/422 Update EA values

OS-422 did not include the EA change in OS-500 which resulted in OS-500
reappearing.

Change-Id: I6344a95940d820fa2268d5510a44984d84e56ee1
OS-549, unused exceptions removed, code refactored
Merge pull request #27 from roman-verchikov/OS-500/422

OS-500/422 Update EA values
OS-509, retry 3 times create IOS object, before fall with exception
Merge pull request #24 from Vegasq/OS-549

OS-549, unused exceptions removed
Merge pull request #22 from Vegasq/OS-509

OS-509, retry 3 times create IOS object, before fall with exception
OS-432 Update existing NIOS network on subnet create