[NFC] various code cleanup on CRM_Contact_BAO_Query

[eileenmcnaughton]

Overview

Minor code cleanup

Before

Code less stdised

After

Code more stdised

Technical Details

Fix comment blocks, correct parameter types in blocks etc, fix some miscased fn calls, add throws tags
use strict comparison when comparing with strings

Comments

[civibot]

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[seamuslee001]

Looks fine to me reviewed it all and i'm confident we have solid test coverage in this area merge on pass