IVGCVSW-2379 Add Greater Ref workload implementation

 * Added the Greater operation as an element-wise workload
 * Added the unit tests

Change-Id: Ie00ee30e47a5f5e17a728032eeb11a085d06c8f2
diff --git a/src/backends/reference/RefLayerSupport.cpp b/src/backends/reference/RefLayerSupport.cpp
index 2952ae1..a64339e 100644
--- a/src/backends/reference/RefLayerSupport.cpp
+++ b/src/backends/reference/RefLayerSupport.cpp
@@ -257,6 +257,21 @@
                                      &TrueFunc<>);
 }
 
+bool RefLayerSupport::IsGreaterSupported(const TensorInfo& input0,
+                                         const TensorInfo& input1,
+                                         const TensorInfo& output,
+                                         Optional<std::string&> reasonIfUnsupported) const
+{
+    ignore_unused(input0);
+    ignore_unused(input1);
+    ignore_unused(output);
+    ignore_unused(reasonIfUnsupported);
+    return IsSupportedForDataTypeRef(reasonIfUnsupported,
+                                     input0.GetDataType(),
+                                     &TrueFunc<>,
+                                     &TrueFunc<>);
+}
+
 bool RefLayerSupport::IsInputSupported(const TensorInfo& input,
                                        Optional<std::string&> reasonIfUnsupported) const
 {