Move RawQuerySniff rom MEQP Coding Standard

[lenaorobei]

Description

Move RawQuerySniff from MEQP Coding Standard:

Acceptance criteria:

• sniff is moved from MEQP repo to magento-coding-standard;
• sniff is covered by unit test;
• unite test covers negative and positive scenarios.

Additional information

Type: warning.
Severity: 9.

[lenaorobei]

Done in #52