IVGCVSW-3221 Refactor Mean ref workload and tests

 * Renamed RefMeanFloat32Workload and RefMeanUint8Workload
   to RefMeanWorkload, updated references to reflect this
   change.
 * Refactored RefFloorWorkload to use Decoders/Encoders,
   to support the use of multiple data types.
 * Deleted reference Unit8 Mean tests as they were
   duplicates of the Float32 tests. Refactored these tests
   to support multiple data types and updated references.
 * Adjusted the values used in the tests' input tensors so
   that they are more like floating point numbers
   e.g. change 1.0f to 1.5f.
 * Replace size_t with unsigned int in Mean ref workload,
   for better compatibility with the Encoder/Decoder,
   removed some unnecessary casts after this.
 * Added ValidateTensorDataTypesMatch() function to
   WorkloadData.cpp, added CreateIncorrectDimensionsErrorMsg
   function to RefLayerSupport.cpp.
 * Added passing and failing tests for ref IsMeanSupported.

Signed-off-by: James Conroy <james.conroy@arm.com>
Change-Id: Id3d44463d1385255c727a497d4026d21a49e7eb2
diff --git a/src/backends/reference/test/RefLayerTests.cpp b/src/backends/reference/test/RefLayerTests.cpp
index 7ff6d1b..c2cda8e 100644
--- a/src/backends/reference/test/RefLayerTests.cpp
+++ b/src/backends/reference/test/RefLayerTests.cpp
@@ -607,19 +607,21 @@
 ARMNN_AUTO_TEST_CASE(SimpleConvertFp32ToFp16, SimpleConvertFp32ToFp16Test)
 
 // Mean
-ARMNN_AUTO_TEST_CASE(MeanUint8Simple, MeanUint8SimpleTest)
-ARMNN_AUTO_TEST_CASE(MeanUint8SimpleAxis, MeanUint8SimpleAxisTest)
-ARMNN_AUTO_TEST_CASE(MeanUint8KeepDims, MeanUint8KeepDimsTest)
-ARMNN_AUTO_TEST_CASE(MeanUint8MultipleDims, MeanUint8MultipleDimsTest)
-ARMNN_AUTO_TEST_CASE(MeanVtsUint8, MeanVtsUint8Test)
+ARMNN_AUTO_TEST_CASE(MeanSimpleFloat32, MeanSimpleTest<armnn::DataType::Float32>)
+ARMNN_AUTO_TEST_CASE(MeanSimpleAxisFloat32, MeanSimpleAxisTest<armnn::DataType::Float32>)
+ARMNN_AUTO_TEST_CASE(MeanKeepDimsFloat32, MeanKeepDimsTest<armnn::DataType::Float32>)
+ARMNN_AUTO_TEST_CASE(MeanMultipleDimsFloat32, MeanMultipleDimsTest<armnn::DataType::Float32>)
+ARMNN_AUTO_TEST_CASE(MeanVts1Float32, MeanVts1Test<armnn::DataType::Float32>)
+ARMNN_AUTO_TEST_CASE(MeanVts2Float32, MeanVts2Test<armnn::DataType::Float32>)
+ARMNN_AUTO_TEST_CASE(MeanVts3Float32, MeanVts3Test<armnn::DataType::Float32>)
 
-ARMNN_AUTO_TEST_CASE(MeanFloatSimple, MeanFloatSimpleTest)
-ARMNN_AUTO_TEST_CASE(MeanFloatSimpleAxis, MeanFloatSimpleAxisTest)
-ARMNN_AUTO_TEST_CASE(MeanFloatKeepDims, MeanFloatKeepDimsTest)
-ARMNN_AUTO_TEST_CASE(MeanFloatMultipleDims, MeanFloatMultipleDimsTest)
-ARMNN_AUTO_TEST_CASE(MeanVtsFloat1, MeanVtsFloat1Test)
-ARMNN_AUTO_TEST_CASE(MeanVtsFloat2, MeanVtsFloat2Test)
-ARMNN_AUTO_TEST_CASE(MeanVtsFloat3, MeanVtsFloat3Test)
+ARMNN_AUTO_TEST_CASE(MeanSimpleQuantisedAsymm8, MeanSimpleTest<armnn::DataType::QuantisedAsymm8>)
+ARMNN_AUTO_TEST_CASE(MeanSimpleAxisQuantisedAsymm8, MeanSimpleAxisTest<armnn::DataType::QuantisedAsymm8>)
+ARMNN_AUTO_TEST_CASE(MeanKeepDimsQuantisedAsymm8, MeanKeepDimsTest<armnn::DataType::QuantisedAsymm8>)
+ARMNN_AUTO_TEST_CASE(MeanMultipleDimsQuantisedAsymm8, MeanMultipleDimsTest<armnn::DataType::QuantisedAsymm8>)
+ARMNN_AUTO_TEST_CASE(MeanVts1QuantisedAsymm8, MeanVts1Test<armnn::DataType::QuantisedAsymm8>)
+ARMNN_AUTO_TEST_CASE(MeanVts2QuantisedAsymm8, MeanVts2Test<armnn::DataType::QuantisedAsymm8>)
+ARMNN_AUTO_TEST_CASE(MeanVts3QuantisedAsymm8, MeanVts3Test<armnn::DataType::QuantisedAsymm8>)
 
 ARMNN_AUTO_TEST_CASE(AdditionAfterMaxPool, AdditionAfterMaxPoolTest)