Work around Leiningen issue 1099
Make sure defhistogram, defcounter, deftimer and so on quote metric titles

Without this change, defhistogram and friends won't compile.

Currently desugared-title returns the name as a list of 3 strings,
which needs to be quoted for things to compile:

("test" "group" "ubermetric")

will be evaluated without quoting.
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1.0.1
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