feature #2097: Replace VMware network management from vSphere CLI in front-end to ESX cmds

(cherry picked from commit 39b2fe6e2be1eb6ed5f90fc7b36d2ba96a065625)
feature #2097: change vlan always in the port group

(cherry picked from commit 0b72e80ca21a60827f1c09e4a3f245ea81839607)
feature #2097: Fine tune new VMware net drivers

(cherry picked from commit 9b959b8af3c282de98f43e624fee606aea721551)
feature #2097: Fix hardcoded value

(cherry picked from commit 7da46dc169658b561ef3bf5ceba1210032b1ce46)
feature #2097: Minor modifications to VMware driver

(cherry picked from commit 83337eb15b4ca64f7436c166b868d0d8619eeef9)