Added a regression test with mixed tri and quad elements where quads are ordered first

(cherry picked from commit cab8670f)

solvers/IncNavierStokesSolver/CMakeLists.txt

@@ -97,6 +97,7 @@ IF( NEKTAR_SOLVER_INCNAVIERSTOKES )
     ADD_NEKTAR_TEST(Tet_channel_robin_m3)
     ADD_NEKTAR_TEST(Tet_channel_m4_per)
     ADD_NEKTAR_TEST(Tet_channel_varP)
+    ADD_NEKTAR_TEST(TriQuadChannel)
     ADD_NEKTAR_TEST_LENGTHY(Tet_prism_channel_rad)
     ADD_NEKTAR_TEST_LENGTHY(Tet_equitri)
     ADD_NEKTAR_TEST_LENGTHY(Prism_channel_m6)

solvers/IncNavierStokesSolver/Tests/TriQuadChannel.tst

+<?xml version="1.0" encoding="utf-8"?>
+<test>
+    <description>Tri and Quad element channel Flow 2D</description>
+    <executable>IncNavierStokesSolver</executable>
+    <parameters>TriQuadChannel.xml</parameters>
+    <files>
+        <file description="Session File">TriQuadChannel.xml</file>
+    </files>
+    <metrics>
+        <metric type="L2" id="1">
+            <value variable="u" tolerance="1e-12">5.37124e-14</value>
+            <value variable="v" tolerance="1e-12">2.48979e-14</value>
+	    <value variable="p" tolerance="1e-12">1.46992e-12</value>
+        </metric>
+        <metric type="Linf" id="2">
+            <value variable="u" tolerance="1e-12">1.47216e-13</value>
+            <value variable="v" tolerance="1e-12">2.96768e-14</value>
+	    <value variable="p" tolerance="1e-12">7.59719e-13</value>
+        </metric>
+    </metrics>
+</test>
+
+