Merge pull request #1534 from nobodyiam/apollo-client-compile-issue

Manually stick spring boot to 1.5.x for apollo-client, so that we could compile apollo-client against Java 7

apollo-client/pom.xml

@@ -14,6 +14,19 @@
 		<java.version>1.7</java.version>
 		<github.path>${project.artifactId}</github.path>
 	</properties>
+	<dependencyManagement>
+		<dependencies>
+			<!-- Spring Boot 2 requires Java 8, so we need to manually stick to 1.5.x version in order to compile apollo-client against Java 7 -->
+			<!-- This is only for apollo-client compilation use, because optional Spring dependencies are not transitive -->
+			<dependency>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-dependencies</artifactId>
+				<version>1.5.16.RELEASE</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 	<dependencies>
 		<!-- apollo -->
 		<dependency>