tests: gstbuffer: add tests for some mulitple map combinations
tests: gstbuffer: add tests for some mulitple map combinations

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