After release cleanups.

See #2156

parent/pom.xml

@@ -140,7 +140,7 @@
 		<javax-annotation-api>1.3.2</javax-annotation-api>
 
 		<!-- Used in asciidoc reference documentation -->
-		<releasetrain>2021.2.18</releasetrain>
+		<releasetrain>2021.2.19-SNAPSHOT</releasetrain>
 
 		<!-- To be overridden by individual modules -->
 		<java-module-name/>
@@ -1320,8 +1320,20 @@
 	</build>
 
 	<repositories>
-		
-		
+		<repository>
+			<id>spring-snapshot</id>
+			<url>https://repo.spring.io/snapshot</url>
+			<snapshots>
+				<enabled>true</enabled>
+			</snapshots>
+			<releases>
+				<enabled>false</enabled>
+			</releases>
+		</repository>
+		<repository>
+			<id>spring-milestone</id>
+			<url>https://repo.spring.io/milestone</url>
+		</repository>
 	</repositories>
 
 </project>