Fix manifest.f4m generator

Change attribute "bootstrapinfoId" in "media" node to "bootstrapInfoId", because OSMF 2.0 doesn't accept "bootstrapinfoId"

```
$ diff ./manifest_good.f4m ./manifest_bad.f4m
7,9c7,9
< <media streamId="some_video" url="0/" bootstrapInfoId="bootstrap" bitrate="9290000"  />
< <media streamId="some_video" url="1/" bootstrapInfoId="bootstrap" bitrate="5560000"  />
< <media streamId="some_video" url="2/" bootstrapInfoId="bootstrap" bitrate="2240000"  />
---
> <media streamId="some_video" url="0/" bootstrapinfoId="bootstrap" bitrate="9290000"  />
> <media streamId="some_video" url="1/" bootstrapinfoId="bootstrap" bitrate="5560000"  />
> <media streamId="some_video" url="2/" bootstrapinfoId="bootstrap" bitrate="2240000"  />
```

Demo
Bad: http://osmf.org/dev/2.0gm/StrobeMediaPlayback.html?src=https://s3.amazonaws.com/hds_test/bunny_hds/manifest_bad.f4m
Good: http://osmf.org/dev/2.0gm/StrobeMediaPlayback.html?src=https://s3.amazonaws.com/hds_test/bunny_hds/manifest_good.f4m