Run python in unbuffered mode on Drone
Run python in unbuffered mode on Drone

The test output currently freezes while the tests are running on Drone. Then, suddenly, all the test output appears when it's done.

I assume this has got something to do with python buffering stdout, this commit disables that.
kaedroho/wagtail,gasman/wagtail,iansprice/wagtail,nutztherookie/wagtail,torchbox/wagtail,mikedingjan/wagtail,FlipperPA/wagtail,zerolab/wagtail,thenewguy/wagtail,nealtodd/wagtail,timorieber/wagtail,nutztherookie/wagtail,rsalmaso/wagtail,zerolab/wagtail,thenewguy/wagtail,jnns/wagtail,nealtodd/wagtail,nutztherookie/wagtail,iansprice/wagtail,wagtail/wagtail,thenewguy/wagtail,kaedroho/wagtail,nealtodd/wagtail,mixxorz/wagtail,kaedroho/wagtail,kaedroho/wagtail,iansprice/wagtail,gasman/wagtail,takeflight/wagtail,timorieber/wagtail,takeflight/wagtail,nimasmi/wagtail,jnns/wagtail,mikedingjan/wagtail,gasman/wagtail,thenewguy/wagtail,gasman/wagtail,mikedingjan/wagtail,zerolab/wagtail,iansprice/wagtail,mikedingjan/wagtail,torchbox/wagtail,rsalmaso/wagtail,torchbox/wagtail,Toshakins/wagtail,Toshakins/wagtail,mixxorz/wagtail,jnns/wagtail,nimasmi/wagtail,FlipperPA/wagtail,wagtail/wagtail,rsalmaso/wagtail,mixxorz/wagtail,FlipperPA/wagtail,timorieber/wagtail,wagtail/wagtail,zerolab/wagtail,nimasmi/wagtail,mixxorz/wagtail,zerolab/wagtail,wagtail/wagtail,FlipperPA/wagtail,rsalmaso/wagtail,thenewguy/wagtail,rsalmaso/wagtail,nimasmi/wagtail,takeflight/wagtail,wagtail/wagtail,nealtodd/wagtail,kaedroho/wagtail,takeflight/wagtail,mixxorz/wagtail,timorieber/wagtail,nutztherookie/wagtail,torchbox/wagtail,Toshakins/wagtail,Toshakins/wagtail,jnns/wagtail,gasman/wagtail