TST: Change QIIME 2 installation source for Travis
TST: Change QIIME 2 installation source for Travis

Changes QIIME 2 to install from the github repo instead of the conda
channel

jairideout/q2cli,qiime2/q2cli,qiime2/q2cli,jakereps/q2cli,jairideout/q2cli,jakereps/q2cli,gregcaporaso/q2cli,gregcaporaso/q2cli