remove requirements check for networking-fortinet
remove requirements check for networking-fortinet

we decoupled the api client from networking-fortinet and make it
a standalone library but it hasn't made into global requirements
yet causing the requirements check to fail, so remove requirements
check for the moment until fortiosclient is in openstack/requirements.

Change-Id: I1c8aa1ad81c4e631dcf2135b1a874f6df2f4295d

Tesora/tesora-project-config,openstack-infra/project-config,Tesora/tesora-project-config,openstack-infra/project-config