Delete attributes related to configuration-and-switch-control

[PrathibaJee]

For the Proposal in the issue openBackhaul/core#29 , need to prune the CoreModel.

Solution :
In the UML2YANG tool in the experimental branch , require to modify the field "Prune" to true as mentioned in the following table to the /models/tools/pruning-and-refactoring/core-model/src/main/resources/xslt/pruning-control.xml.

Attribute	Pruning-control.xml id
layer-protocol/configuration-and-switch-control	<property id="_d6vwsMQhEeWlWIVxswb46A" name="_configurationAndSwitchControl" prune="true"/>
fc/configuration-and-switch-control	<property id="_v6GHsJ4LEeOO3om500DFKg" name="_configurationAndSwitchControl" prune="true"/>
fc/fc-switch/configuration-and-switch-control	<property id="_1EKuQJo5EeOyHKqw-cQ_eg" name="_configurationAndSwitchControl" prune="true"/>
fc/fc-switch/internal-configuration-and-switch-control	<property id="_tbetAJ4HEeOO3om500DFKg" name="_internalConfigurationAndSwitchControl" prune="true"/>
clock/encapsulated-casc	<property id="_UJ_6IXXIEeeqyuooNTTDCg" name="_encapsulatedCasc" prune="true"/>
casc-port/encapsulating-casc-port	<property id="_hcC-ovj7EeaAw4wsR4LIsQ" name="_encapsulatingCascPort" prune="true"/>