qemu: assume support for all migration protocols except rdma

Since we require QEMU 0.12.0, we can assume that QEMU supports
all of the fd, tcp, unix and exec migration protocols.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

tests/qemucaps2xmldata/all_1.6.0-1.caps

@@ -1,13 +1,10 @@
   <qemuCaps>
-    <flag name='migrate-qemu-tcp'/>
-    <flag name='migrate-qemu-exec'/>
     <flag name='drive-cache-v2'/>
     <flag name='drive-format'/>
     <flag name='vga'/>
     <flag name='0.10'/>
     <flag name='mem-path'/>
     <flag name='drive-serial'/>
-    <flag name='migrate-qemu-unix'/>
     <flag name='chardev'/>
     <flag name='enable-kvm'/>
     <flag name='monitor-json'/>
@@ -30,7 +27,6 @@
     <flag name='vga-qxl'/>
     <flag name='spice'/>
     <flag name='vga-none'/>
-    <flag name='migrate-qemu-fd'/>
     <flag name='boot-index'/>
     <flag name='hda-duplex'/>
     <flag name='drive-aio'/>