Fixed a bug with service.clear
Fixed a bug with service.clear

The clear function would have thrown an error when clearing a non array
filter.term property.

kamikasky/ui-grid,YonatanKra/ui-grid,yccteam/ui-grid,kamikasky/ui-grid,YonatanKra/ui-grid,yccteam/ui-grid,YonatanKra/ui-grid,yccteam/ui-grid,kamikasky/ui-grid