Music scripts: add python3 compatibility

[rcrdnalor]

The attached patch adds compatibility to python3 for the grabber and lyrics scripts in mythtv/programs/scripts/metadata/Music.

Note: The following scripts seem to be broken for python2 and are not handled by this patch:

• Music/lyrics/alsong.py
• Music/lyrics/baidu.py
• Music/lyrics/lyricsmode.py

Tested with

$ python[2,3] filelyrics.py -v
$ python[2,3] filelyrics.py -d -t
$ python[2,3] darklyrics.py -v
$ python[2,3] darklyrics.py -d -t
$ python[2,3] embedlrc.py -v
$ python[2,3] embedlrc.py -d -t
$ python[2,3] genius.py -v
$ python[2,3] genius.py -d -t
$ python2 genius.py -s -a "Celine Dion" -b "D'Eux" -n "J'attendais"
$ python3 genius.py -s -a "Céline Dion" -b "D'Eux" -n "J'attendais"
$ python[2,3] lyricscom.py -v
$ python[2,3] lyricscom.py -d -t
$ python2 lyricscom.py -s -a "Celine Dion" -b "D'Eux" -n "J'attendais"
$ python3 lyricscom.py -s -a "Céline Dion" -b "D'Eux" -n "J'attendais"
$ python[2,3] lyricswiki.py -v
$ python[2,3] lyricswiki.py --d -t
$ python2 lyricswiki.py -s -a "Celine Dion" -b "D'Eux" -n "J'attendais"
$ python3 lyricswiki.py -s -a "Céline Dion" -b "D'Eux" -n "J'attendais"
$ python[2,3] ttplayer.py -v
$ python[2,3] ttplayer.py -d -t
$ python[2,3] mbutils.py -v
$ python[2,3] mbutils.py -d -t
$ python[2,3] mbutils.py -s -a 'Dire Straits'
$ python[2,3] mbutils.py -s -a "Céline Dion"
$ python[2,3] mbutils.py -g -i "847e8a0c-cc20-4213-9e16-975515c2a926"
$ python[2,3] mbutils.py -r -a "Céline Dion" -b "D'Eux"
$ python[2,3] mbutils.py -f --id '65528137-f5e3-4d94-8e0c-f984346e4ef6'
$ python[2,3] mbutils.py --finddisc --cddevice /dev/sr0   -->  Santana: Supernatural

Not working grabbers and therefore not handled within this issue:

$ python2 alsong.py -d -t 
    --> NOK  urllib2.URLError: <urlopen error [Errno -2] Name or service not known>

$ python2 baidu.py -d -t
    --> NOK   http://music.baidu.com/search/lrc?key=Money For Nothing-Dire Straits
    
$ python2 lyricsmode.py -d -t
    --> NOK

[rcrdnalor]

Add compatibility to python3 for music grabber scripts

[Bill Meek]

Paul, I grabbed this since I applied Roland's other solutions.

[Roland Ernst <rcrernst@…>]

In f1d8870c1d/mythtv:

Python Bindings: adds python3 compatibility to Music scripts

Closes #13545

Signed-off-by: Bill Meek <billmeek@…>