Add diagnostic information to threadlocals [SWS-289]

[gregturn]

Arjen Poutsma opened SWS-289 and commented

All ThreadLocals used should have some sort of diagnostic information, i.e. a nice toString() method.

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Referenced from: commits 9cd5b19

[gregturn]

Arjen Poutsma commented

Closing issues in 1.5 RC1.