test_webapp.py: improve test names to include "api" where needed
test_webapp.py: improve test names to include "api" where needed

Signed-off-by: Stefano Zacchiroli <d7cdf09fc0f0426e98c9978ee42da5d61fa54986@upsilon.cc>

zacchiro/debsources,zacchiro/debsources,oorestisime/debsources,zacchiro/debsources,matthieucan/debsources,oorestisime/debsources,zacchiro/debsources,clemux/debsources,Debian/debsources,devoxel/debsources,vivekanand1101/debsources,sophiejjj/debsources,devoxel/debsources,clemux/debsources,Debian/debsources,sophiejjj/debsources,matthieucan/debsources,devoxel/debsources,zacchiro/debsources,Debian/debsources,oorestisime/debsources,vivekanand1101/debsources,Debian/debsources,clemux/debsources,devoxel/debsources,clemux/debsources,oorestisime/debsources,oorestisime/debsources,devoxel/debsources,vivekanand1101/debsources,sophiejjj/debsources,clemux/debsources,matthieucan/debsources,vivekanand1101/debsources,sophiejjj/debsources,sophiejjj/debsources,Debian/debsources,vivekanand1101/debsources,matthieucan/debsources,matthieucan/debsources