Alternative to manual #undef verify trick for Poco.
- Defines macros w/ underscore.
- This is default behavior in OSX 10.9+ in AssertMacros.h

(cherry picked from commit 50c52f371460bea5ca95cdeb3a4687bc0d9003db)
Merge pull request #3450 from bakercp/apothecary-poco-libs

Alternative to manual #undef verify trick for Poco.