Renamed test to match main source

Author: lutovich

plugin-maven/src/test/java/com/diffplug/spotless/maven/kotlin/KtLintTest.java plugin-maven/src/test/java/com/diffplug/spotless/maven/kotlin/KtlintTest.java

@@ -19,7 +19,7 @@
 
 import com.diffplug.spotless.maven.MavenIntegrationTest;
 
-public class KtLintTest extends MavenIntegrationTest {
+public class KtlintTest extends MavenIntegrationTest {
 
 	@Test
 	public void testKtlint() throws Exception {