remove python 2.6 trove classifier
remove python 2.6 trove classifier

OpenStack projects are no longer being tested under Python 2.6, so
remove the trove classifier implying that this project supports 2.6.

Change-Id: I1db1cfaf6cb1483fc0a0ea5a257d85784f038244

hcarlsso/CloudVideo,MartinPaulo/son_of_faafo,stackforge/faafo,hcarlsso/CloudVideo,MartinPaulo/faafo,stackforge/faafo,MartinPaulo/faafo,stackforge/faafo,MartinPaulo/faafo,hcarlsso/CloudVideo,MartinPaulo/son_of_faafo,MartinPaulo/son_of_faafo