Unskip testProtocolInstanceCannotBecomeActiveWithLessThanFourServers since it works well (#153)

* unskip testProtocolInstanceCannotBecomeActiveWithLessThanFourServers since it works well

* decrease number of nodes in test_instance_cannot_become_active_with_less_than_four_servers to 13

Author: mzk-vct

plenum/test/instances/test_instance_cannot_become_active_with_less_than_four_servers.py

@@ -19,17 +19,17 @@
 
 
 # noinspection PyIncorrectDocstring
-@pytest.mark.skip(reason="SOV-940")
+# @pytest.mark.skip(reason="SOV-940")
 def testProtocolInstanceCannotBecomeActiveWithLessThanFourServers(
         tdir_for_func):
     """
     A protocol instance must have at least 4 nodes to come up.
     The status of the nodes will change from starting to started only after the
     addition of the fourth node to the system.
     """
-    nodeCount = 16
-    f = 5
-    minimumNodesToBeUp = 16 - f
+    nodeCount = 13
+    f = 4
+    minimumNodesToBeUp = nodeCount - f
 
     nodeNames = genNodeNames(nodeCount)
     with TestNodeSet(names=nodeNames, tmpdir=tdir_for_func) as nodeSet: