requirements: remove paramiko <2.0 cap

It seems like recent version fixes deadlock issue and there is security
concerns regarding PyCrypto: http://www.paramiko.org/installing-1.x.html

Change-Id: I601de7319d2ed7746135028b64483110c19becdf
Signed-off-by: Paul Belanger <pabelanger@redhat.com>
1 file changed