Fix the import statements in hadoop-aws module

mvn -Pclover clean install -DskipTests --projects '!hadoop-client-modules/hadoop-client-check-invariants,!hadoop-client-modules/hadoop-client-check-test-invariants' 

com.atlassian.clover.api.CloverException: /Users/tdomok/Work/hadoop/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/DeleteOperation.java:31:85:unexpected token: ;