test: Use bigger disks for TestStorageLvm2.testRaidRepair

There is a race between the kernel and lvconvert which might cause
lvconvert to hang when the kernel is done repairing before lvconvert
has resumed all device mapper devices.

Let's try to slow down the repair process by making the disks bigger.

See https://bugzilla.redhat.com/show_bug.cgi?id=2256433

test/verify/check-storage-lvm2

@@ -457,10 +457,10 @@ class TestStorageLvm2(storagelib.StorageCase):
 
         self.login_and_go("/storage")
 
-        disk1 = self.add_ram_disk()
-        disk2 = self.add_loopback_disk(name="loop10")
-        disk3 = self.add_loopback_disk(name="loop11")
-        disk4 = self.add_loopback_disk(name="loop12")
+        disk1 = self.add_ram_disk(size=200)
+        disk2 = self.add_loopback_disk(name="loop10", size=400)
+        disk3 = self.add_loopback_disk(name="loop11", size=400)
+        disk4 = self.add_loopback_disk(name="loop12", size=400)
 
         # Make a volume group with three physical volumes
 
@@ -525,7 +525,7 @@ class TestStorageLvm2(storagelib.StorageCase):
         b.click(self.card_button("LVM2 logical volume", "Repair"))
         self.dialog_wait_open()
         self.dialog_apply()
-        self.dialog_wait_error("pvs", "An additional 46.1 MB must be selected")
+        self.dialog_wait_error("pvs", "An additional 206 MB must be selected")
         self.dialog_set_val("pvs", {disk4: True})
         self.dialog_apply()
         self.dialog_wait_close()