Update to MediaPartStream and inheriting classes

[blacktwin]

Description

Clean up of MediaPartStream and it's inheriting classes (video, audio, subtitle).
Moving common attribs among video, audio, and subtitle streams into parent MediaPartStream.
Removal of no longer present attribs from video, audio, subtitle, and MediaPartStream.

Addresses #536

Type of change

• Bug fix (non-breaking change which fixes an issue)
  Technically not a bug fix, but code clean up.

[JonnyWong16]

I have also added the following attributes to my forked plexapi-3.6.0:

~plexapi.media.Media

self.audioProfile=data.attrib.get('videoProfile')
self.proxyType=cast(int, data.attrib.get('proxyType'))
self.optimizedVersion=self.proxyType==SEARCHTYPES['optimizedVersion']
# For Photo onlyself.aperture=data.attrib.get('aperture')
self.exposure=data.attrib.get('exposure')
self.iso=cast(int, data.attrib.get('iso'))
self.lens=data.attrib.get('lens')
self.make=data.attrib.get('make')
self.model=data.attrib.get('model')

~plexapi.media.MediaPart

self.audioProfile=data.attrib.get('audioProfile')
self.deepAnalysisVersion=cast(int, data.attrib.get('deepAnalysisVersion'))
self.has64bitOffsets=cast(bool, data.attrib.get('has64bitOffsets'))
self.hasThumbnail=cast(bool, data.attrib.get('hasThumbnail'))
self.packetLength=cast(int, data.attrib.get('packetLength'))
self.requiredBandwidths=data.attrib.get('requiredBandwidths')

~plexapi.media.VideoStream

self.anamorphic=data.attrib.get('anamorphic')
self.chromaLocation=data.attrib.get('chromaLocation')
self.DOVIBLCompatID=cast(int, data.attrib.get('DOVIBLCompatID'))
self.DOVIBLPresent=cast(bool, data.attrib.get('DOVIBLPresent'))
self.DOVIELPresent=cast(bool, data.attrib.get('DOVIELPresent'))
self.DOVILevel=cast(int, data.attrib.get('DOVILevel'))
self.DOVIPresent=cast(bool, data.attrib.get('DOVIPresent'))
self.DOVIProfile=cast(int, data.attrib.get('DOVIProfile'))
self.DOVIRPUPresent=cast(bool, data.attrib.get('DOVIRPUPresent'))
self.DOVIVersion=cast(float, data.attrib.get('DOVIVersion'))
self.pixelAspectRatio=data.attrib.get('pixelAspectRatio')
self.pixelFormat=data.attrib.get('pixelFormat')
self.streamIdentifier=cast(int, data.attrib.get('streamIdentifier'))

~plexapi.media.AudioStream

self.profile=data.attrib.get('profile')
# For Track onlyself.albumGain=cast(float, data.attrib.get('albumGain'))
self.albumPeak=cast(float, data.attrib.get('albumPeak'))
self.albumRange=cast(float, data.attrib.get('albumRange'))
self.endRamp=data.attrib.get('endRamp')
self.gain=cast(float, data.attrib.get('gain'))
self.loudness=cast(float, data.attrib.get('loudness'))
self.lra=cast(float, data.attrib.get('lra'))
self.peak=cast(float, data.attrib.get('peak'))
self.startRamp=data.attrib.get('startRamp')

~plexapi.media.SubtitleStream

self.container=data.attrib.get('container')
self.forced=cast(bool, data.attrib.get('forced', '0'))
self.format=data.attrib.get('format')
self.headerCompression=data.attrib.get('headerCompression')

~plexapi.media.LyricStream (STREAMTYPE = 4)

self.format=data.attrib.get('format')
self.minLines=cast(int, data.attrib.get('minLines'))
self.provider=data.attrib.get('provider')
self.timed=cast(bool, data.attrib.get('timed', '0'))

[JonnyWong16]

TODO: Update doc strings.

[JonnyWong16]

Cherrypick this commit.
JonnyWong16@e346f0b

[JonnyWong16]

Tests have been updated with the new attributes