Gh#3219 nodeos crash

[heifner]

• Add reflector_verifier_visitor for classes that wish to validate reflection serialization
• Add exception handling to exception to_string and to_detail_string so that exceptions are not generated when trying to print exception information.
• Add common handle_exception method for http api handlers
• Add reflector_verify for FC_REFLECT of symbol to fix divide by zero identified in abi_bin_to_json with bad data crashes nodeos #3219.

Resolves #3219

[heifner]

@tbfleming Pointed out issue with destructor throwing during stack unwind causing a terminate.