Added ONVIF camera component (#7979)

* Added ONVIF camera component

* added requirements

* corrected long lines

* fixed indenting

* fixed indenting

* removed bad whitespace

* updated coveragerc

* Added ONVIF camera component

* added requirements

* corrected long lines

* fixed indenting

* fixed indenting

* removed bad whitespace

* updated requirements

* updated requirements

* Added ONVIF camera component

* added requirements

* corrected long lines

* fixed indenting

* fixed pylink error indenting

* Added ONVIF camera component

* added requirements

* corrected long lines

* fixed indenting

* fixed indenting

* removed bad whitespace

* updated requirements

* fixed indenting

* removed bad whitespace

* updated requirements

* fixed pylink error indenting

* rebased and fixed requirements

* Removed Debug logging

* Added info logging to show URL being used.

* corrected spacing

* Tidied up and renamed input to host

* fixed typo

* corrected line lengths

* added default to ffmpeg_arguments

* removed unecessary ffmpeg arguements

* changed to use .format instead of +

* fixed indenting

* cleanup & make it more readable