test prepared statements with acra-censor

[Lagovas]

• add usage of prepared statements in acra-censor tests and refactored connections to re-use the same code (connections with different drivers and text/binary prepared statements per db type) in several places
• add query as is if can't normalize to QueryIgnore handler to allow ignore queries that can't parse

[vixentael]

So, at the end:

AcraCensor can filter prepare statements only using QueryCapture/QueryIgnore (by comparing incoming SQL char-by-char with SQL from config file). AcraCensor can't apply allow/deny rules for SQL requests with prepared statements.