Upgrade tests to use Java 17

Author: philwebb

spring-javaformat/spring-javaformat-formatter-tests/pom.xml

@@ -12,7 +12,7 @@
 	<name>Spring JavaFormat Formatter Tests</name>
 	<properties>
 		<main.basedir>${basedir}/../..</main.basedir>
-		<java.version>11</java.version>
+		<java.version>17</java.version>
 	</properties>
 	<dependencies>
 		<!-- Compile -->