Remove use of Java 17 language features in SDG 2.x line of development.

Author: jxblum

spring-data-geode/src/main/java/org/springframework/data/gemfire/config/annotation/support/AbstractAnnotationConfigSupport.java

@@ -1004,7 +1004,7 @@ protected Optional<String> resolveBeanClassName(@Nullable BeanDefinition beanDef
 			.map(BeanDefinition::getBeanClassName)
 			.filter(StringUtils::hasText);
 
-		boolean beanClassNameNotPresent = beanClassName.isEmpty();
+		boolean beanClassNameNotPresent = !beanClassName.isPresent();
 
 		if (beanClassNameNotPresent) {
 			beanClassName = optionalBeanDefinition

spring-data-geode/src/main/java/org/springframework/data/gemfire/config/annotation/support/EmbeddedServiceConfigurationSupport.java

@@ -225,7 +225,9 @@ protected <T> T resolveBean(Class<T> beanType) {
 
 		BeanFactory beanFactory = getBeanFactory();
 
-		if (beanFactory instanceof AutowireCapableBeanFactory autowiringBeanFactory) {
+		if (beanFactory instanceof AutowireCapableBeanFactory) {
+
+			AutowireCapableBeanFactory autowiringBeanFactory = (AutowireCapableBeanFactory) beanFactory;
 
 			NamedBeanHolder<T> beanHolder = autowiringBeanFactory.resolveNamedBean(beanType);
 
@@ -349,8 +351,8 @@ protected GemFirePropertiesBeanPostProcessor(@NonNull Properties gemfireProperti
 		@Override
 		public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
 
-			if (bean instanceof Properties gemfirePropertiesBean && GEMFIRE_PROPERTIES_BEAN_NAME.equals(beanName)) {
-				gemfirePropertiesBean.putAll(this.gemfireProperties);
+			if (bean instanceof Properties && GEMFIRE_PROPERTIES_BEAN_NAME.equals(beanName)) {
+				((Properties) bean).putAll(this.gemfireProperties);
 			}
 
 			return bean;