collectpads: Fix memory leak in unit test
collectpads: Fix memory leak in unit test

krichter722/gstreamer,shelsonjava/gstreamer,cablelabs/gstreamer,krichter722/gstreamer,jpxiong/gstreamer,jpakkane/gstreamer,surround-io/gstreamer,centricular/gstreamer,cablelabs/gstreamer,cablelabs/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,Lachann/gstreamer,cablelabs/gstreamer,centricular/gstreamer,shelsonjava/gstreamer,Lachann/gstreamer,jpxiong/gstreamer,jpakkane/gstreamer,centricular/gstreamer,surround-io/gstreamer,shelsonjava/gstreamer,krichter722/gstreamer,jpakkane/gstreamer,Lachann/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,jpxiong/gstreamer,mparis/gstreamer,jpakkane/gstreamer,mparis/gstreamer,jpakkane/gstreamer,Lachann/gstreamer,surround-io/gstreamer,mparis/gstreamer,centricular/gstreamer,jpxiong/gstreamer,mparis/gstreamer,centricular/gstreamer,shelsonjava/gstreamer,Lachann/gstreamer,cablelabs/gstreamer,mparis/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,surround-io/gstreamer,surround-io/gstreamer