IVGCVSW-3999 Add unit tests for new comparison operations

* Refactored existing tests for Equal and Greater and moved them
  to ComparisonTestImpl.cpp
* Removed EqualTestImpl.cpp and GreaterTestImpl.cpp
* Added new unit tests for GreaterOrEqual, Less, LessOrEqual
  and NotEqual

Signed-off-by: Aron Virginas-Tar <Aron.Virginas-Tar@arm.com>
Change-Id: I25013200beb1acb88e83b813c5382cb277c74cd7
diff --git a/src/backends/backendsCommon/test/LayerTests.hpp b/src/backends/backendsCommon/test/LayerTests.hpp
index eb41314..05c307e 100644
--- a/src/backends/backendsCommon/test/LayerTests.hpp
+++ b/src/backends/backendsCommon/test/LayerTests.hpp
@@ -11,6 +11,7 @@
 #include <backendsCommon/test/layerTests/ArgMinMaxTestImpl.hpp>
 #include <backendsCommon/test/layerTests/BatchNormalizationTestImpl.hpp>
 #include <backendsCommon/test/layerTests/BatchToSpaceNdTestImpl.hpp>
+#include <backendsCommon/test/layerTests/ComparisonTestImpl.hpp>
 #include <backendsCommon/test/layerTests/ConcatTestImpl.hpp>
 #include <backendsCommon/test/layerTests/ConvertFp16ToFp32TestImpl.hpp>
 #include <backendsCommon/test/layerTests/ConvertFp32ToFp16TestImpl.hpp>
@@ -21,12 +22,10 @@
 #include <backendsCommon/test/layerTests/DequantizeTestImpl.hpp>
 #include <backendsCommon/test/layerTests/DetectionPostProcessTestImpl.hpp>
 #include <backendsCommon/test/layerTests/DivisionTestImpl.hpp>
-#include <backendsCommon/test/layerTests/EqualTestImpl.hpp>
 #include <backendsCommon/test/layerTests/FakeQuantizationTestImpl.hpp>
 #include <backendsCommon/test/layerTests/FloorTestImpl.hpp>
 #include <backendsCommon/test/layerTests/FullyConnectedTestImpl.hpp>
 #include <backendsCommon/test/layerTests/GatherTestImpl.hpp>
-#include <backendsCommon/test/layerTests/GreaterTestImpl.hpp>
 #include <backendsCommon/test/layerTests/InstanceNormalizationTestImpl.hpp>
 #include <backendsCommon/test/layerTests/L2NormalizationTestImpl.hpp>
 #include <backendsCommon/test/layerTests/LogSoftmaxTestImpl.hpp>