tests: fix simple-launch-lines compilation
tests: fix simple-launch-lines compilation

Don't use removed API.

lubosz/gstreamer,lovebug356/gstreamer,justinjoy/gstreamer,cablelabs/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,krieger-od/gstreamer,cfoch/gstreamer,lubosz/gstreamer,StreamUtils/gstreamer,lubosz/gstreamer,cfoch/gstreamer,ensonic/gstreamer,ensonic/gstreamer,jpxiong/gstreamer,cablelabs/gstreamer,surround-io/gstreamer,lubosz/gstreamer,jpakkane/gstreamer,mparis/gstreamer,mparis/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,centricular/gstreamer,cablelabs/gstreamer,jpxiong/gstreamer,cablelabs/gstreamer,lubosz/gstreamer,ensonic/gstreamer,collects/gstreamer,jpakkane/gstreamer,StreamUtils/gstreamer,surround-io/gstreamer,justinjoy/gstreamer,krichter722/gstreamer,surround-io/gstreamer,StreamUtils/gstreamer,lovebug356/gstreamer,jpakkane/gstreamer,ensonic/gstreamer,centricular/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer,Lachann/gstreamer,surround-io/gstreamer,krieger-od/gstreamer,krieger-od/gstreamer,cfoch/gstreamer,krieger-od/gstreamer,collects/gstreamer,cfoch/gstreamer,shelsonjava/gstreamer,lovebug356/gstreamer,StreamUtils/gstreamer,krieger-od/gstreamer,centricular/gstreamer,Lachann/gstreamer,mparis/gstreamer,mparis/gstreamer,ensonic/gstreamer,shelsonjava/gstreamer,shelsonjava/gstreamer,justinjoy/gstreamer,krichter722/gstreamer,jpxiong/gstreamer,jpakkane/gstreamer,jpxiong/gstreamer,centricular/gstreamer,surround-io/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,collects/gstreamer,krichter722/gstreamer,Lachann/gstreamer,mparis/gstreamer,krichter722/gstreamer,collects/gstreamer,lovebug356/gstreamer,shelsonjava/gstreamer,lovebug356/gstreamer,collects/gstreamer,jpxiong/gstreamer,centricular/gstreamer,Lachann/gstreamer,cfoch/gstreamer