Restrict setup_interface_count tests to serial

test/tests/userobjects/setup_interface_count/tests

@@ -1,8 +1,15 @@
 # The following tests are designed to count how often the setup methods are called (initialSetup, etc.),
 # which requires that the threading be disabeled because the counts can differ.
 #
-# Also, GeneralUserObject must also be restricted for a certain MPI because their methods will be called
-# on each processor, since they are not distributed in any fashion.
+# GeneralUserObject must also be restricted for a certain MPI because
+# their methods will be called on each processor, since they are not
+# distributed in any fashion.
+#
+# Other UserObject tests here include a subdomainSetup count, which
+# depends on the number of transitions between subdomains while
+# iterating over local elements, which depend on how mesh
+# partitioning assigns local elements.  We'll just run them all in
+# serial.
 [Tests]
   [./GeneralUserObject]
     type = CSVDiff
@@ -17,23 +24,27 @@
     input = element.i
     csvdiff = element_out.csv
     max_threads = 1
+    max_parallel = 1
   [../]
   [./SideUserObject]
     type = CSVDiff
     input = side.i
     csvdiff = side_out.csv
     max_threads = 1
+    max_parallel = 1
   [../]
   [./InternalSideUserObject]
     type = CSVDiff
     input = internal_side.i
     csvdiff = internal_side_out.csv
     max_threads = 1
+    max_parallel = 1
   [../]
   [./NodalSideUserObject]
     type = CSVDiff
     input = nodal.i
     csvdiff = nodal_out.csv
     max_threads = 1
+    max_parallel = 1
   [../]
 []