install two different versions of leap_cli

for our CI testing i need one leap_cli from master and one from develop (which we are going to use once leap_cli is released, if i remeber right).

The idea would be to test leap_platform:master with leap_cli:master and leap_platform:develop with leap_cli:develop.

how would i do that best ?

(from redmine: created on 2013-07-04, closed on 2013-07-08, relates #2395 (closed))