FacilityID naming

[pdestefanis]

When updating a facilty ID using http://act-in.idg-rti.org/act_in/locations/edit/ the only shortnames allowed are [A-Z^P^K][0-9]{3,6}

It should be [A-Z^P^K][A-Z,0-9]{3,6}

The message should go from:

Please enter location short name starting with a letter and 3 to 6 digits

to

Please enter location short name starting with a letter (not P or K) and 3 to 6 alphanumeric digits