Adding support for case insensitive like constraint

[abitoprakash]

Issue - balderdashy/sails#4628

Change log

• Passing meta from query to compileStatement from following methods
  • avg
  • count
  • destroy
  • select
  • sum
  • update
• Adding meta as parameter to compileStatement
• Adding modify-where-clause which checks for makeLikeModifierCaseInsensitive in meta and replaces LIKE with ILIKE if present
• Adding test cases for insensitive queries
• Minor eslint fix in lib/private/redact-passwords.js (Missing semicolon)

[abitoprakash]

@eashaw, @DominusKelvin Let me know what you guys think

[DominusKelvin]

Thanks for working on this @abitoprakash, I'll have a look shortly.