Merge pull request #14307 from seamuslee001/dao_style

CRM/Batch/DAO/Batch.php

CRM/Campaign/DAO/Campaign.php

CRM/Contact/DAO/Contact.php

CRM/Contact/DAO/RelationshipType.php

CRM/Contribute/DAO/Contribution.php

CRM/Contribute/DAO/ContributionPage.php

CRM/Contribute/DAO/ContributionRecur.php

CRM/Contribute/DAO/ContributionSoft.php

CRM/Contribute/DAO/Product.php

CRM/Core/CodeGen/Specification.php

CRM/Core/DAO/Address.php

CRM/Core/DAO/Component.php

CRM/Core/DAO/MappingField.php

CRM/Event/DAO/Event.php

CRM/Event/DAO/Participant.php

CRM/Financial/DAO/EntityFinancialTrxn.php

CRM/Financial/DAO/FinancialAccount.php

CRM/Financial/DAO/FinancialItem.php

CRM/Financial/DAO/FinancialTrxn.php

CRM/Grant/DAO/Grant.php