Description of problem:
libguestfs installation failed with dependency issue of qemu-kvm-rhev / qemu-kvm-ma on ppc64le


Version-Release number of selected component (if applicable):
libguestfs.ppc64le 1:1.36.10-6.el7_5.1


How reproducible:
100%


Steps:
1. Try to install libguestfs.ppc64le on ppc64le(p8) + RHEL7.5 with this repo:
[rhel7.5-z-candidate]
name=rhel7.5-z-candidate
baseurl=http://download.eng.brq.redhat.com/rel-eng/repos/rhel-7.5-z-candidate/ppc64le/
gpgcheck=0
enabled=1

[rhevh-rhel-7.5-candidate]
name=rhevh-rhel-7.5-candidate
baseurl=http://download.eng.brq.redhat.com/rel-eng/repos/rhevh-rhel-7.5-candidate/ppc64le/
gpgcheck=0
enabled=1

2. Installation failed because it only depend on qemu-kvm-ma , not qemu-kvm-rhev.
# yum install libguestfs
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
Resolving Dependencies
--> Running transaction check
---> Package libguestfs.ppc64le 1:1.36.10-6.el7_5.1 will be installed
--> Processing Dependency: libvirt-daemon-kvm >= 3.9.0-1 for package: 1:libguestfs-1.36.10-6.el7_5.1.ppc64le
--> Processing Dependency: /usr/bin/qemu-img for package: 1:libguestfs-1.36.10-6.el7_5.1.ppc64le
--> Processing Dependency: qemu-img-ma for package: 1:libguestfs-1.36.10-6.el7_5.1.ppc64le
Package qemu-img-ma is obsoleted by qemu-img-rhev, but obsoleting package does not provide for requirements
--> Running transaction check
---> Package libguestfs.ppc64le 1:1.36.10-6.el7_5.1 will be installed
--> Processing Dependency: qemu-img-ma for package: 1:libguestfs-1.36.10-6.el7_5.1.ppc64le
Package qemu-img-ma is obsoleted by qemu-img-rhev, but obsoleting package does not provide for requirements
... ...
---> Package libguestfs.ppc64le 1:1.36.10-6.el7_5.1 will be installed
--> Processing Dependency: qemu-img-ma for package: 1:libguestfs-1.36.10-6.el7_5.1.ppc64le
Package qemu-img-ma is obsoleted by qemu-img-rhev, but obsoleting package does not provide for requirements
... ...
---> Package qemu-kvm-rhev.ppc64le 10:2.10.0-21.el7_5.2 will be installed
--> Processing Dependency: qemu-kvm-common-rhev = 10:2.10.0-21.el7_5.2 for package: 10:qemu-kvm-rhev-2.10.0-21.el7_5.2.ppc64le
--> Running transaction check
---> Package libguestfs.ppc64le 1:1.36.10-6.el7_5.1 will be installed
--> Processing Dependency: qemu-img-ma for package: 1:libguestfs-1.36.10-6.el7_5.1.ppc64le
Package qemu-img-ma is obsoleted by qemu-img-rhev, but obsoleting package does not provide for requirements
... ...
---> Package qemu-kvm-common-rhev.ppc64le 10:2.10.0-21.el7_5.2 will be installed
--> Finished Dependency Resolution
Error: Package: 1:libguestfs-1.36.10-6.el7_5.1.ppc64le (rhel7.5-z-candidate)
           Requires: qemu-img-ma
           Available: 10:qemu-img-ma-2.10.0-21.el7.ppc64le (beaker-Server)
               qemu-img-ma = 10:2.10.0-21.el7
           Available: 10:qemu-img-ma-2.10.0-21.el7_5.2.ppc64le (rhel7.5-z-candidate)
               qemu-img-ma = 10:2.10.0-21.el7_5.2
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

If there is only qemu-kvm-ma in the repo, then everything goes well.
If qemu-kvm-rhev is installed in advance , it will also fail.


3. Don't need to pay attention on the repo I used, the main problem is that , for:
 ppc64le(p8)+RHEL7.5, ppc64le(p9)+RHEL7.5+ALT, s390x+RHEL7.5+ALT, aarch64+RHEL7.5+ALT 

Since both qemu-kvm-rhev & qemu-kvm-ma should be supported(according to junli@), so no matter which qemu-kvm* is provided(you don't know which one the customer would like to use or is using), libguestfs should always be installed successfully without dependency error.



Actual results:
The command failed to run 


Expected results:
The command should run successfully.


Additional info:
ppc64le, aarch64, s390x all have the same problem.