Worked on below issues
1)Disabled the VMI combobox if VN is None
2)Trimmed the VMI and VN values before submitting for post
3)Hadled error in case Port creation

Change-Id: I7ae2d47eb3e5a594bb63339771949241476b0417
Merge pull request #25 from sbavanasi/baremetal_3

Worked on below issues