[Test/Matlab] Run TestImport on all platforms

This portion of the Matlab test suite was being skipped on some platforms and/or
Matlab versions. Switching to the 'classdef' style of tests fixes the problem.

test/matlab/TestImport.m

@@ -0,0 +1,18 @@
+classdef TestImport < TestCase
+    methods
+        function self = TestImport(name)
+            self = self@TestCase(name);
+        end
+
+        function testImportXML(self)
+            gas = Solution('gri30.xml', 'gri30_mix');
+            dkm = mixDiffCoeffs(gas);
+            assertEqual(length(dkm), nSpecies(gas))
+        end
+
+        function testImportCTI(self)
+            gas = Solution('h2o2.cti');
+            assertEqual(temperature(gas), 300)
+        end
+    end
+end

test/matlab/testImport.m

@@ -1,13 +0,0 @@
-function test_suite = testImport
-initTestSuite;
-
-function testImportXML
-gas = Solution('gri30.xml', 'gri30_mix');
-dkm = mixDiffCoeffs(gas);
-assertEqual(length(dkm), nSpecies(gas))
-
-function testImportCTI
-gas = Solution('h2o2.cti');
-assertEqual(temperature(gas), 300)
-
-cleanup()