tests: remove use of virTestOOMActive from bhyve testsuite
tests: remove use of virTestOOMActive from bhyve testsuite

The virTestOOMActive method was deleted in

  commit 2c52ecd96086b4643b99b4570b5823d40ce2787b
  Author: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>
  Date:   Thu Aug 29 13:04:07 2019 +0100

    util: purge all code for testing OOM handling

Signed-off-by: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

zippy2/libvirt,jfehlig/libvirt,zippy2/libvirt,andreabolognani/libvirt,olafhering/libvirt,zippy2/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,libvirt/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,olafhering/libvirt,andreabolognani/libvirt,nertpinx/libvirt,libvirt/libvirt,olafhering/libvirt,fabianfreyer/libvirt,zippy2/libvirt,jfehlig/libvirt,crobinso/libvirt,jardasgit/libvirt,nertpinx/libvirt,libvirt/libvirt,andreabolognani/libvirt,nertpinx/libvirt,jardasgit/libvirt,nertpinx/libvirt,jfehlig/libvirt,andreabolognani/libvirt,crobinso/libvirt,crobinso/libvirt,fabianfreyer/libvirt,olafhering/libvirt,andreabolognani/libvirt,jardasgit/libvirt,libvirt/libvirt,crobinso/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,jardasgit/libvirt