Removed special case for unit test on linux.

This test was relying on the GetJobsBySourceName query to return whatever file had a matching relative path in the database along with the fact that on linux, this test had the same casing for both the overrider and original file, resulting in the same fingerprint and no work being done.
Since we're no longer expecting relative paths to be unique, the query now uses rel path + scanfolder Id, meaning the GetJobsBySourceName query returns no results when the override file is deleted in this test.

Signed-off-by: amzn-mike <[email protected]>

Code/Tools/AssetProcessor/native/unittests/AssetProcessorManagerUnitTests.cpp

@@ -1641,11 +1641,16 @@ namespace AssetProcessor
 
         sortAssetToProcessResultList(processResults);
 
-#if defined(AZ_PLATFORM_LINUX)
-        // On Linux, because of we cannot change the case of the source file, the job fingerprint is not updated due the case-switch so
-        // there will be actually nothing to process
-        UNIT_TEST_EXPECT_TRUE(processResults.size() == 0);
-#else
+        // On Linux, because we cannot change the case of the source file, the job fingerprint is not updated due the case-switch.
+        // The reason the fingerprint for subfolder3/basefile.txt and subfolder2/basefile.txt are the same ON LINUX is because the
+        // fingerprint of the file includes the filename (also both files have the same contents).  Additionally, when this test is set up,
+        // subfolder3BaseFilePath ON LINUX is set to basefile.txt whereas it is set to BaseFile.txt on windows.  That is why the hash is the
+        // same only for linux but different for other platforms. Note that if this test breaks on linux, it can be debugged on windows by
+        // setting subfolder3BaseFilePath = basefile.txt on windows.
+        // We still expect linux to produce the same result as other platforms however because we no longer query sources using just the relative path.
+        // This means the override file which has not been processed yet MUST be processed, regardless of whether it just happens to have the same fingerprint
+        // on linux.
+
         // --------- same result as above ----------
         UNIT_TEST_EXPECT_TRUE(processResults.size() == 4); // 2 each for pc and android,since we have two recognizer for .txt file
         UNIT_TEST_EXPECT_TRUE(processResults[0].m_jobEntry.m_platformInfo.m_identifier == processResults[1].m_jobEntry.m_platformInfo.m_identifier);
@@ -1663,7 +1668,7 @@ namespace AssetProcessor
             verifyProductPaths(processResults[checkIdx]);
             UNIT_TEST_EXPECT_TRUE(processResults[checkIdx].m_jobEntry.m_computedFingerprint != 0);
         }
-#endif // defined(AZ_PLATFORM_LINUX)
+
         relativePathFromWatchFolder = "somefile.xxx";
         watchFolderPath = tempPath.absoluteFilePath("subfolder3");
         absolutePath = watchFolderPath + "/" + relativePathFromWatchFolder;