Add local repository support

Update the Maven build so that a local artifact repository can be
specified. This will allow the CI server to build the samples and tests
using artifacts generated from an early job.

See gh-9316

pom.xml

@@ -41,6 +41,32 @@
 				<module>spring-boot-tests</module>
 			</modules>
 		</profile>
+		<profile>
+			<id>repository</id>
+			<activation>
+				<property>
+					<name>repository</name>
+				</property>
+			</activation>
+			<repositories>
+				<repository>
+					<id>repository</id>
+					<url>${repository}</url>
+					<snapshots>
+						<enabled>true</enabled>
+					</snapshots>
+				</repository>
+			</repositories>
+			<pluginRepositories>
+				<pluginRepository>
+					<id>repository</id>
+					<url>${repository}</url>
+					<snapshots>
+						<enabled>true</enabled>
+					</snapshots>
+				</pluginRepository>
+			</pluginRepositories>
+		</profile>
 	</profiles>
 	<repositories>
 		<!-- Repositories to allow snapshot and milestone BOM imports during development.