Tag release 4.3.4

[FrankApiyo]

Changes

Bump version to v4.3.4

Release notes

Enhancements

• Entities search by @kelvin-muchiri in https://github.com/onaio/onadata/pull/2643
• Optimize updates to project date_modified field when submitting data by @KipSigei in https://github.com/onaio/onadata/pull/2642
• Add support for defining Entity properties within grouped sections by @kelvin-muchiri in https://github.com/onaio/onadata/pull/2644
• Remove default ordering on XForm, Attachment model by @kelvin-muchiri in https://github.com/onaio/onadata/pull/2645
• Cache XForm manifest data by @kelvin-muchiri in https://github.com/onaio/onadata/pull/2646
• Exclude deleted Entities from form's manifest data by @kelvin-muchiri in https://github.com/onaio/onadata/pull/2648
• Add email field to the organization serializer by @FrankApiyo in https://github.com/onaio/onadata/pull/2647
• Use actual User, Group instances in migration file by @kelvin-muchiri in https://github.com/onaio/onadata/pull/2655

[KipSigei]

@FrankApiyo Update the versions here and here