Migrated the following modules to parent-boot with spring-boot 2.1:

spring-cloud-data-flow/etl/customer-mongodb-sink
spring-cloud-data-flow/etl/customer-transform

spring-cloud-data-flow/etl/customer-mongodb-sink/pom.xml

@@ -16,12 +16,12 @@
         <version>0.0.1-SNAPSHOT</version>
         <relativePath>../../../parent-boot-2</relativePath>
     </parent>
- 
+
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
-        <spring-cloud.version>Finchley.SR1</spring-cloud.version>
+        <spring-cloud.version>Greenwich.M3</spring-cloud.version>
     </properties>
 
     <dependencies>
@@ -70,5 +70,16 @@
         </plugins>
     </build>
 
+    <repositories>
+        <repository>
+            <id>spring-milestones</id>
+            <name>Spring Milestones</name>
+            <url>http://repo.spring.io/milestone</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+
 
 </project>

spring-cloud-data-flow/etl/customer-transform/pom.xml

@@ -22,7 +22,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
-        <spring-cloud.version>Finchley.SR1</spring-cloud.version>
+        <spring-cloud.version>Greenwich.M3</spring-cloud.version>
     </properties>
 
     <dependencies>
@@ -63,5 +63,15 @@
         </plugins>
     </build>
 
+    <repositories>
+        <repository>
+            <id>spring-milestones</id>
+            <name>Spring Milestones</name>
+            <url>http://repo.spring.io/milestone</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
 
 </project>