Closes-Bug: #1539559 - Added a check if a value is already set to the dropdown and setting the default value if it is not. This way the model selected value will be retained and not overriden by the defaultValueId.
Closes-Bug: #1539559 - Added a check if a value is already set to the dropdown
and setting the default value if it is not. This way the model selected value
will be retained and not overriden by the defaultValueId.

Change-Id: I553414267ac1f378c6430e71b303635cd031083e

biswajit-mandal/contrail-web-core,biswajit-mandal/contrail-web-core,vishnuvv/contrail-web-core,nagakiran/contrail-web-core,vishnuvv/contrail-web-core,nagakiran/contrail-web-core,biswajit-mandal/contrail-web-core,vishnuvv/contrail-web-core,nagakiran/contrail-web-core