DATACMNS-1755 - Use specialized assertThat*Exception.

When possible replace `assertThatExceptionOfType` calls with the
equivalent specialized variant.

Original pull request: #448.

src/test/java/org/springframework/data/querydsl/QPageRequestUnitTests.java

@@ -57,7 +57,7 @@ public class QPageRequestUnitTests extends AbstractPageRequestUnitTests {
 	@Test // DATACMNS-1581
 	void rejectsNullSort() {
 
-		assertThatExceptionOfType(IllegalArgumentException.class) //
+		assertThatIllegalArgumentException() //
 				.isThrownBy(() -> QPageRequest.of(0, 10, (QSort) null));
 	}
 }

src/test/java/org/springframework/data/querydsl/binding/QuerydslBindingsFactoryUnitTests.java

@@ -98,7 +98,7 @@ class QuerydslBindingsFactoryUnitTests {
 	@Test // DATACMNS-669
 	void rejectsPredicateResolutionIfDomainTypeCantBeAutoDetected() {
 
-		assertThatExceptionOfType(IllegalStateException.class)//
+		assertThatIllegalStateException()//
 				.isThrownBy(() -> factory.createBindingsFor(ClassTypeInformation.from(ModelAndView.class)))//
 				.withMessageContaining(QuerydslPredicate.class.getSimpleName())//
 				.withMessageContaining("root");