Update MP UT to support arbitrary # of GPUs; multiple bugfixes (#16)

* Fixing temp file creation/deletion for Clique kernel mode.

* Refactoring of MP unit tests; include bugfixes and general support for any number of GPUs

* GroupCall MP UT properly quits when too many devices specified

* MP UT will programmatically set NCCL_COMM_ID if not specified; updated install script

test/test_GatherMultiProcess.hpp

@@ -19,11 +19,15 @@ namespace CorrectnessTests
                                dataset.NumBytes(), hipMemcpyDeviceToHost));
         }
 
-        void TestGather(int rank, Dataset& dataset)
+        void TestGather(int rank, Dataset& dataset, bool& pass)
         {
             SetUpPerProcess(rank, ncclCollGather, comms[rank], streams[rank], dataset);
 
-            if (numDevices > numDevicesAvailable) return;
+            if (numDevices > numDevicesAvailable)
+            {
+                pass = true;
+                return;
+            }
 
             Barrier barrier(rank, numDevices, std::atoi(getenv("NCCL_COMM_ID")));
 
@@ -44,7 +48,7 @@ namespace CorrectnessTests
                 HIP_CALL(hipStreamSynchronize(streams[rank]));
 
                 // Check results
-                ValidateResults(dataset, rank, root);
+                pass = ValidateResults(dataset, rank, root);
 
                 // Ensure all processes have finished current iteration before proceeding
                 barrier.Wait();