ENH: cleanup headers

Code/UtilitiesAdapters/OssimAdapters/otbDEMHandler.h

Code/UtilitiesAdapters/OssimAdapters/otbEllipsoidAdapter.cxx

...ilitiesAdapters/OssimAdapters/otbFilterFunctionValues.cxx

...UtilitiesAdapters/OssimAdapters/otbFilterFunctionValues.h

...pters/OssimAdapters/otbFormosatImageMetadataInterface.cxx

...dapters/OssimAdapters/otbFormosatImageMetadataInterface.h

...dapters/OssimAdapters/otbIkonosImageMetadataInterface.cxx

...sAdapters/OssimAdapters/otbIkonosImageMetadataInterface.h

...sAdapters/OssimAdapters/otbImageMetadataInterfaceBase.cxx

...iesAdapters/OssimAdapters/otbImageMetadataInterfaceBase.h

...ilitiesAdapters/OssimAdapters/otbMapProjectionAdapter.cxx

Code/UtilitiesAdapters/OssimAdapters/otbMetaDataKey.cxx

Code/UtilitiesAdapters/OssimAdapters/otbMetaDataKey.h

...apters/OssimAdapters/otbOpticalImageMetadataInterface.cxx

...Adapters/OssimAdapters/otbOpticalImageMetadataInterface.h

...ters/OssimAdapters/otbQuickBirdImageMetadataInterface.cxx

...apters/OssimAdapters/otbQuickBirdImageMetadataInterface.h

...esAdapters/OssimAdapters/otbSarImageMetadataInterface.cxx

...tiesAdapters/OssimAdapters/otbSarImageMetadataInterface.h

...UtilitiesAdapters/OssimAdapters/otbSensorModelAdapter.cxx