Adjust docker image configurations (#167)

Partially resolves #156

Author: onobc

dataflow-website/stream-developer-guides/streams/standalone-stream-sample/pom.xml

@@ -42,7 +42,7 @@
                 <artifactId>spring-boot-maven-plugin</artifactId>
                 <configuration>
                     <image>
-                        <name>springcloudstream/multi-io-sample-${project.artifactId}:${project.version}</name>
+                        <name>springcloudstream/${project.artifactId}:${project.version}</name>
                     </image>
                 </configuration>
             </plugin>

multi-io-samples/kafka-streams/user-clicks-per-region-1.2.x/user-clicks-per-region-processor/pom.xml

@@ -134,7 +134,7 @@
 						<name>springcloudstream/multi-io-sample-${project.artifactId}:${project.version}</name>
 						<env>
 							<BP_IMAGE_LABELS>
-								configuration-properties.inbound-ports="${configuration-properties.inbound-ports}",configuration-properties.outbound-ports="${configuration-properties.outbound-ports}"
+								configuration-properties.inbound-ports="${configuration-properties.inbound-ports}" configuration-properties.outbound-ports="${configuration-properties.outbound-ports}"
 							</BP_IMAGE_LABELS>
 						</env>
 					</image>