Renamed test names to be more plain (#600)

At a glance, the names of test cases such as "rft_0_ift_2" are not
understandable without knowing what the acronyms mean. The directories
of the new test case names will continue to use the acronyms as that
better depicts the contents of the test files present.

test/ci_support/cdash_analyze_and_report_random_failures_UnitTests.py

@@ -207,7 +207,7 @@ def tearDown(self):
     # Test the random failure case of a single initial test containing
     # one passing and one failing test in its test history, both with the same SHA1 pairs
     #
-    def test_rft_1_ift_2(self):
+    def test_random_failure(self):
 
         testCaseName = "rft_1_ift_2"
         cdash_analyze_and_report_random_failures_setup_test_dir(testCaseName)
@@ -248,9 +248,9 @@ def test_rft_1_ift_2(self):
                 "--days-of-history=3"
             ]
         )
-    # TODO: Remove the current "random" test case as this should be the base case
 
-    def test_rft_0_ift_2(self):
+
+    def test_no_random_failure(self):
 
         testCaseName = "rft_0_ift_2"
         cdash_analyze_and_report_random_failures_setup_test_dir(testCaseName)