Changed the name of UnitTests to rccl-UnitTests (wrapper executable included).

rtest.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <testset>
     <!-- Typically run with environment variables NCCL_DEBUG=INFO HSA_FORCE_FINE_GRAIN_PCIE=1 -->
-    <var name="GTEST_FILTER">UnitTests  --gtest_color=yes --gtest_filter=</var>
+    <var name="GTEST_FILTER">rccl-UnitTests  --gtest_color=yes --gtest_filter=</var>
     <test sets="psdb">
         <run name="all-psdb">{GTEST_FILTER}*sum_float32* --gtest_output=xml:output_psdb.xml </run>
     </test>