Fixed the test error of camel-example-cxf with CXF 3.0.0
CAMEL-7457 Does not override the "Content-Type" header of CXF response
CAMEL-7457 fixed the test error and added an unit test for CxfRsHeaderFilterStrategy
CAMEL-7457 polish the code with the suggestion of Clause
CAMEL-7465 DefaultFilterStrategy should take an account of case insensitive with thanks to Seiji
fix CAMEL-7450: CsvDataFormat unable to setup header when useMaps=true
CAMEL-7450 Fixed the unit test errors and added an unit for the map skipFirstLine
CAMEL-7450 Added an unit test based on ccancellieri's patch