PartMapper: Fix release status beta -> testing
PartMapper: Fix release status beta -> testing

The spec doesn't have a `beta` status as far as I can tell. This sets it
to `testing` (which is in the spec).

mhoram-kerbin/NetKAN,techman83/NetKAN,Shaymes/NetKAN,distantcam/NetKAN,BobPalmer/NetKAN,ItMustBeACamel/NetKAN,alephnaughty/NetKAN,phardy/NetKAN,politas/NetKAN,BobPalmer/NetKAN,henrybauer/NetKAN,mgsdk/NetKAN,NathanKell/NetKAN,Space-Duck/NetKAN,SuicidalInsanity/NetKAN,jrossignol/NetKAN,Niemand303/NetKAN,aw1621107/NetKAN,distantcam/NetKAN,DMagic1/NetKAN,civilwargeeky/NetKAN,jkoritzinsky/NetKAN,Dazpoet/NetKAN,DaMichel/NetKAN,plague006/NetKAN,Shaymes/NetKAN,magico13/NetKAN,Raptor831/NetKAN,sswelm/NetKAN,sumghai/NetKAN,Niemand303/NetKAN,iPeer/NetKAN,TiktaalikDreaming/NetKAN,NecroBones/NetKAN,Dazpoet/NetKAN,Cphoenix/NetKAN,bld/NetKAN,Raptor831/NetKAN,puetzk/NetKAN,raidernick/NetKAN,plague006/NetKAN,godarklight/NetKAN,TeddyDD/NetKAN,Kerbas-ad-astra/NetKAN,rkagerer/NetKAN,BasharMilesTeg/NetKAN,jkoritzinsky/NetKAN,severedsolo/NetKAN,toadicus/NetKAN,civilwargeeky/NetKAN,Starstrider42/NetKAN,toadicus/NetKAN,alephnaughty/NetKAN,Kerbas-ad-astra/NetKAN,NecroBones/NetKAN,magico13/NetKAN,blowfishpro/NetKAN,sswelm/NetKAN,bld/NetKAN,jenyaza01/NetKAN,iPeer/NetKAN,mgsdk/NetKAN,ItMustBeACamel/NetKAN,godarklight/NetKAN