Removed `data-miq_observe` from drop down
Removed `data-miq_observe` from drop down

miqSelectPickerEvent is being called to observe botstrap dropdowns, having both observers causes double transactions to be sent upto server and causes an issue in UI randomly.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1601915
Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1614437

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic