Rename to testing/egX folder when running 'make egX'
Rename to testing/egX folder when running 'make egX'

Makes it simpler to compare to older testing jobs.

nickvandewiele/RMG-Py,chatelak/RMG-Py,nyee/RMG-Py,nyee/RMG-Py,chatelak/RMG-Py,pierrelb/RMG-Py,nickvandewiele/RMG-Py,pierrelb/RMG-Py