Add snapshot plugin repository to Data REST sample

See gh-673

Author: luvarqpp

samples/rest-notes-spring-data-rest/pom.xml

@@ -133,5 +133,15 @@
 			</snapshots>
 		</repository>
 	</repositories>
+	<pluginRepositories>
+		<pluginRepository>
+			<id>spring-snapshot</id>
+			<name>Spring Snapshot Repository</name>
+			<url>https://repo.spring.io/snapshot</url>
+			<snapshots>
+				<enabled>true</enabled>
+			</snapshots>
+		</pluginRepository>
+	</pluginRepositories>
 
 </project>