generatechangelog oracle fails with lowercase schema name

Description

when running the command generatechangelog on an existing oracle database with a lowercase user/schema name liquibase fails to find any results and returns an empty changelog xml file.

From what I can tell, the cause of this is that liquibase is changing the user/schema name to all caps, which in oracle fails to match in the existing database and the select statements return zero results. I've tried encapsulating the user name in quotes, which doesn't help at all. If I explicitly set the schema name using the defaultschemaname property, either with or without quotes, then liquibase will find and output the sequences, but nothing else.

liquibase command:

liquibase --changeLogFile="origChangeLog.xml" --logLevel="debug" generateChangeLog

liquibase properties:

#Liquibase.properties      
        driver: oracle.jdbc.OracleDriver      
        url: jdbc:oracle:thin:@localhost:1521:XE      
        username: "dbuser"      
        password: ***

debug log results:

liquibase --changeLogFile="origChangeLog.xml" --logLevel="debug" generateChangeLog
DEBUG 9/16/14 1:26 PM:liquibase: Connected to "dbuser"@jdbc:oracle:thin:@localhost:1521:XE      
DEBUG 9/16/14 1:26 PM:liquibase: Setting auto commit to false from true      
DEBUG 9/16/14 1:26 PM:liquibase: Executing QUERY database  command: SELECT SEQUENCE_NAME FROM ALL_SEQUENCES WHERE     SEQUENCE_OWNER = 'DBUSER'    
INFO 9/16/14 1:26 PM:liquibase: origChangeLog.xml exists, appending
DEBUG 9/16/14 1:26 PM:liquibase: MissingObjectChangeGenerator     type order: liquibase.structure.core.Catalog liquibase.structure.core.Schema liquibase.structure.core.Sequence liquibase.structure.core.StoredProcedure liquibase.structure.core.Table liquibase.structure.core.Column liquibase.structure.core.PrimaryKey liquibase.structure.core.ForeignKey liquibase.structure.core.UniqueConstraint liquibase.structure.core.Index liquibase.structure.core.View      
DEBUG 9/16/14 1:26 PM:liquibase: UnexpectedObjectChangeGenerator     type order: liquibase.structure.core.Catalog liquibase.structure.core.ForeignKey liquibase.structure.core.Schema liquibase.structure.core.StoredProcedure liquibase.structure.core.UniqueConstraint liquibase.structure.core.View liquibase.structure.core.Table liquibase.structure.core.PrimaryKey liquibase.structure.core.Column liquibase.structure.core.Index liquibase.structure.core.Sequence      
DEBUG 9/16/14 1:26 PM:liquibase: ChangedObjectChangeGenerator     type order: liquibase.structure.core.Catalog liquibase.structure.core.ForeignKey liquibase.structure.core.Schema liquibase.structure.core.Sequence liquibase.structure.core.StoredProcedure liquibase.structure.core.Table liquibase.structure.core.Column liquibase.structure.core.PrimaryKey liquibase.structure.core.Index liquibase.structure.core.UniqueConstraint    liquibase.structure.core.View      
INFO 9/16/14 1:26 PM:liquibase: No changes found, nothing to do      
Liquibase 'generateChangeLog' Successful