Added Harris corner detector unit tests
Added Harris corner detector unit tests

bkloppenborg/arrayfire,jramapuram/arrayfire,umar456/arrayfire,9prady9/arrayfire,marbre/arrayfire,pentschev/arrayfire,asifmadnan/arrayfire,jramapuram/arrayfire,victorv/arrayfire,9prady9/arrayfire,mrgloom/arrayfire,linan7788626/arrayfire,arrayfire/arrayfire,merlin-ext/arrayfire,pombredanne/arrayfire,HolyGeneralK/arrayfire,munnybearz/arrayfire,mrgloom/arrayfire,marbre/arrayfire,arrayfire/arrayfire,hshindo/arrayfire,arrayfire/arrayfire,ghisvail/arrayfire,jramapuram/arrayfire,linan7788626/arrayfire,linan7788626/arrayfire,merlin-ext/arrayfire,shehzan10/arrayfire,asifmadnan/arrayfire,hshindo/arrayfire,9prady9/arrayfire,pentschev/arrayfire,HolyGeneralK/arrayfire,Keno/arrayfire,pentschev/arrayfire,pombredanne/arrayfire,munnybearz/arrayfire,asifmadnan/arrayfire,umar456/arrayfire,shehzan10/arrayfire,ghisvail/arrayfire,mrgloom/arrayfire,victorv/arrayfire,arrayfire/arrayfire,pombredanne/arrayfire,Keno/arrayfire,Keno/arrayfire,umar456/arrayfire,bkloppenborg/arrayfire,pombredanne/arrayfire,merlin-ext/arrayfire,HolyGeneralK/arrayfire,hshindo/arrayfire,hshindo/arrayfire,ghisvail/arrayfire,jramapuram/arrayfire,victorv/arrayfire,shehzan10/arrayfire,ghisvail/arrayfire,merlin-ext/arrayfire,munnybearz/arrayfire,HolyGeneralK/arrayfire,umar456/arrayfire,Keno/arrayfire,shehzan10/arrayfire,bkloppenborg/arrayfire,asifmadnan/arrayfire,pentschev/arrayfire,victorv/arrayfire,mrgloom/arrayfire,marbre/arrayfire,bkloppenborg/arrayfire,marbre/arrayfire,linan7788626/arrayfire,9prady9/arrayfire