[TestFix] Changing code used to create arbiter volumes

As distributed-arbiter and arbiter weren't present before patch [1],
arbiter and distributed-arbiter volumes were created by the hack show
below where a distributed-replicated or replicated volume's configuration
was modified to create an arbiter volume.
```
@runs_on([['replicated', 'distributed-replicated'],
          ['glusterfs', 'nfs']])
class TestSelfHeal(GlusterBaseClass):
   .................

   @classmethod
   def setUpClass(cls):
    ...............

     # Overriding the volume type to specifically test the volume
     # type Change from distributed-replicated to arbiter
     if cls.volume_type == "distributed-replicated":
         cls.volume['voltype'] = { 'type': 'distributed-replicated',
                                   'dist_count': 2,
                                   'replica_count': 3,
                                   'arbiter_count': 1,
                                   'transport': 'tcp'}
```
Now this code is to be updated where we need to remove code which
was used to override volume configuration and
just add arbiter or distributed-arbiter in `@runs_on([],[])`
as shown below:
```
@runs_on([['replicated', 'distributed-arbiter'],
          ['glusterfs', 'nfs']])
class TestSelfHeal(GlusterBaseClass):
```

Links:
[1] https://github.com/gluster/glusto-tests/commit/08b727842bc66603e3b8d1160ee4b15051b0cd20

Change-Id: I4c44c2f3506bd0183fd991354fb723f8ec235a4b
Signed-off-by: kshithijiyer <kshithij.ki@gmail.com>

1 files changed, 1 insertions, 11 deletions

diff --git a/tests/functional/arbiter/test_metadata_self_heal.py b/tests/functional/arbiter/test_metadata_self_heal.py
index 56afaf95e..81a098fff 100755
--- a/tests/functional/arbiter/test_metadata_self_heal.py
+++ b/tests/functional/arbiter/test_metadata_self_heal.py
@@ -36,7 +36,7 @@ from glustolibs.io.utils import (collect_mounts_arequal,
                                  wait_for_io_to_complete)
 
 
-@runs_on([['replicated', 'distributed-replicated'],
+@runs_on([['arbiter', 'distributed-arbiter'],
           ['glusterfs', 'nfs']])
 class TestMetadataSelfHeal(GlusterBaseClass):
     """
@@ -78,16 +78,6 @@ class TestMetadataSelfHeal(GlusterBaseClass):
         # Calling GlusterBaseClass setUpClass
         cls.get_super_method(cls, 'setUpClass')()
 
-        # Overriding the volume type to specifically test the volume type
-        # Change from distributed-replicated to arbiter
-        if cls.volume_type == "distributed-replicated":
-            cls.volume['voltype'] = {
-                'type': 'distributed-replicated',
-                'dist_count': 2,
-                'replica_count': 3,
-                'arbiter_count': 1,
-                'transport': 'tcp'}
-
         # Upload io scripts for running IO on mounts
         g.log.info("Upload io scripts to clients %s for running IO on mounts",
                    cls.clients)