Improve setVideoEncoderConfigurationOptions to return Arrays

[bl0ggy]

I have a HIK Vision camera that returns only one mpeg4ProfileSupported, which is converted to a string instead of an Array by the xml parser

[coveralls]

Coverage decreased (-0.6%) to 87.339% when pulling c796477 on bl0ggy:improve_getVideoEncoderConfigurationOptions into f8ee914 on agsh:master.