Adding javax.annotation-api dependency explicitly

Some integration tests use `@PostConstruct` and the annotation won't
be visible by default on JDK9. This commit adds the jar that contains
this annotation to restore JDK8's behaviour

Author: snicoll

spring-boot-tools/spring-boot-loader/src/it/executable-props-lib/pom.xml

@@ -100,5 +100,10 @@
 			<artifactId>spring-context</artifactId>
 			<version>@spring.version@</version>
 		</dependency>
+		<dependency>
+			<groupId>javax.annotation</groupId>
+			<artifactId>javax.annotation-api</artifactId>
+			<version>1.2</version>
+		</dependency>
 	</dependencies>
 </project>

spring-boot-tools/spring-boot-loader/src/it/executable-props/pom.xml

@@ -88,5 +88,10 @@
 			<artifactId>spring-context</artifactId>
 			<version>@spring.version@</version>
 		</dependency>
+		<dependency>
+			<groupId>javax.annotation</groupId>
+			<artifactId>javax.annotation-api</artifactId>
+			<version>1.2</version>
+		</dependency>
 	</dependencies>
 </project>