Fix cachekey string

[eileenmcnaughton]

Overview

Fixes obscure bug where no custom fields returned when doing a Contact.get api call with check_permissions=0 where the user would not be able to retrieve them if check_permissions=1

Before

I hit a bug (in a unit test) where a user without permissions to access custom data would do a
check_permissions api call followed by a check_permissions = 0 call. In the second call
custom fields were not returned as the 'available' custom fields had been cached on the first call.

After

Fields reflect check_permissions flag

Technical Details

Just a misconstructed cachekeystring - although I would argue it's the wrong place to apply permissions but that's another day

Comments

[civibot]

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