uncap eventlet
uncap eventlet

We will manage the eventlet version using constraints now. See the
thread starting at
http://lists.openstack.org/pipermail/openstack-dev/2018-April/129096.html
for more details.

Change-Id: Idc5272a0b635bdc2495b470a8b6eca17899ff3df
Signed-off-by: Doug Hellmann <0798ebecfb7bc4dfb9d0445c2fa030eb64e1fa1c@doughellmann.com>

openstack/compute-hyperv,openstack/compute-hyperv,stackforge/compute-hyperv