[libvirt] Storage segfaults after phyp patches

[Cole Robinson]

Basically:

> $ gdb virsh
...
> (gdb) run --connect qemu:///session pool-list --all
> Starting program: /usr/bin/virsh --connect qemu:///session pool-list --all
> [Thread debugging using libthread_db enabled]
> Detaching after fork from child process 29579.
> 
> Program received signal SIGSEGV, Segmentation fault.
...
> (gdb) bt
> #0  _libssh2_channel_open (session=0x0, channel_type=0x7ffff7b82737 "session", 
>     channel_type_len=7, window_size=65536, packet_size=32768, message=0x0, 
>     message_len=0) at channel.c:139
> #1  0x00000030cb008a7c in libssh2_channel_open_ex (session=0x0, 
>     type=0x7ffff7b82737 "session", type_len=7, window_size=65536, 
>     packet_size=32768, msg=<value optimized out>, msg_len=0) at channel.c:338
> #2  0x00007ffff7ac9edb in phypExec (session=0x0, 
>     cmd=0x63ba50 "viosvrcmd -m (null) --id 0 -c 'lsvg'|grep -c '^.*$'", 
>     exit_status=0x7fffffffdbcc, conn=<value optimized out>)
>     at phyp/phyp_driver.c:124
> #3  0x00007ffff7acae1c in phypNumOfStoragePools (conn=0x6341b0)
>     at phyp/phyp_driver.c:3032
> #4  0x00007ffff7a771be in virConnectNumOfStoragePools (conn=0x6341b0)
>     at libvirt.c:7223
> #5  0x0000000000415f9e in cmdPoolList (ctl=0x7fffffffdf80, cmd=0x1)
>     at virsh.c:4911
> #6  0x0000000000409dcc in vshCommandRun (ctl=0x7fffffffdf80, cmd=0x62d500)
>     at virsh.c:9647
> #7  0x00000000004186ed in main (argc=5, argv=<value optimized out>)
>     at virsh.c:10656

Looks like the phyp storage driver is being used instead of the libvirtd
storage driver (and then segfaulting). Looked briefly for a fix, but it
wasn't obvious to me.

Thanks,
Cole