Catch "FloatingIpPoolNotFound" in eip.py

This patchset catch the "FloatingIpPoolNotFound" exception in eip
of heat, the floatingippool cannot be configured by heat currently
but it can be assigned by setting 'default_floating_pool' in
nova.conf

Fixes bug #1206865

Change-Id: Idd0fd39f5470904dd351a39f66a57781d9f7c444
Merge "Catch "FloatingIpPoolNotFound" in eip.py"