Fix module filtering

[jpwhite4]

The module filtering code had several problems:

1. the filterByModule() function always included the base module in the result set. This contradicted the function documentation. This meant that the acl-config code was doing N-times the work when N different modules were installed.
2. configuration objects were being filtered only arrays. This meant that the datawarehouse configuration filtering did not work at all and the groupby and statistics information in the database all had incorrect module attribution.

Changes are as follows:

• update filterByMetaData to correctly remove objects that should be removed
• update filterByModule to only return the data for the module rather than return the data for the module and the base module
• acl-config changes to allow for the fact that a module may not provide any settings.
• update unit test expected results as appropriate.