IVGCVSW-4456 Disable NEON PostDetectionProcess

* Reverting to CpuRef workload because it
  currently has better performance.
* Disabling NEON EndToEnd tests.

Signed-off-by: James Conroy <james.conroy@arm.com>
Change-Id: Idd5314e46c50581ef4bec24e391779188f20951b
diff --git a/src/backends/neon/test/NeonEndToEndTests.cpp b/src/backends/neon/test/NeonEndToEndTests.cpp
index 4e9fe0f..abded64 100644
--- a/src/backends/neon/test/NeonEndToEndTests.cpp
+++ b/src/backends/neon/test/NeonEndToEndTests.cpp
@@ -513,7 +513,7 @@
     ArgMinAxis3EndToEnd<armnn::DataType::QAsymmU8>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(NeonDetectionPostProcessRegularNmsTest)
+BOOST_AUTO_TEST_CASE(NeonDetectionPostProcessRegularNmsTest, * boost::unit_test::disabled())
 {
     std::vector<float> boxEncodings({
                                         0.0f, 0.0f, 0.0f, 0.0f,
@@ -550,7 +550,7 @@
     }
 }
 
-BOOST_AUTO_TEST_CASE(NeonDetectionPostProcessRegularNmsUint8Test)
+BOOST_AUTO_TEST_CASE(NeonDetectionPostProcessRegularNmsUint8Test, * boost::unit_test::disabled())
 {
     armnn::TensorInfo boxEncodingsInfo({ 1, 6, 4 }, armnn::DataType::Float32);
     armnn::TensorInfo scoresInfo({ 1, 6, 3 }, armnn::DataType::Float32);
@@ -599,7 +599,7 @@
                                                                              1.0f, 1, 0.01f, 0, 0.5f, 0);
 }
 
-BOOST_AUTO_TEST_CASE(NeonDetectionPostProcessFastNmsTest)
+BOOST_AUTO_TEST_CASE(NeonDetectionPostProcessFastNmsTest, * boost::unit_test::disabled())
 {
     std::vector<float> boxEncodings({
                                         0.0f, 0.0f, 0.0f, 0.0f,
@@ -628,7 +628,7 @@
     DetectionPostProcessFastNmsEndToEnd<armnn::DataType::Float32>(defaultBackends, boxEncodings, scores, anchors);
 }
 
-BOOST_AUTO_TEST_CASE(RefDetectionPostProcessFastNmsUint8Test)
+BOOST_AUTO_TEST_CASE(NeonDetectionPostProcessFastNmsUint8Test, * boost::unit_test::disabled())
 {
     armnn::TensorInfo boxEncodingsInfo({ 1, 6, 4 }, armnn::DataType::Float32);
     armnn::TensorInfo scoresInfo({ 1, 6, 3 }, armnn::DataType::Float32);