HADOOP-18680: Insufficient heap during full test runs in Docker container.

Closes #5522

Signed-off-by: Ayush Saxena <ayushsaxena@apache.org>

dev-support/docker/Dockerfile_aarch64

@@ -74,7 +74,7 @@ ENV PATH "${PATH}:/opt/protobuf/bin"
 ###
 # Avoid out of memory errors in builds
 ###
-ENV MAVEN_OPTS -Xms256m -Xmx1536m
+ENV MAVEN_OPTS -Xms256m -Xmx3072m
 
 # Skip gpg verification when downloading Yetus via yetus-wrapper
 ENV HADOOP_SKIP_YETUS_VERIFICATION true