Unify versions in POMs started by the invoker

Unify the versions used in integration tests launched by the
maven-invoker-plugin. Allows for already cached local copies to be
used, hopefully speeding up the build.

spring-boot-tools/spring-boot-loader-tools/pom.xml

@@ -40,6 +40,11 @@
 			<artifactId>zt-zip</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>springloaded</artifactId>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 	<build>
 		<plugins>