Use Enum16 when more than 127 values

[jaredmdobson]

So we have spaces in our enum values like enum('New Kids on the block', 'whyHaveSpaces who knows') - so i updated the parser to support that.

[bakwc]

Could you please add some simple test for this converter function? All tests are in file test_mysql_ch_replicator.py, here is instructions to run tests localy

Also an existing test failing, test_different_types_2 probably existing enum statement parsing failed, eg: test7 ENUM('point', 'qwe', 'def'),