Issue #2783715 by claudiu.cristea, chx, mikeryan, heddn, phenaproxima: Entity destination ID schema should match entity ID definition

Revert "Issue #2783715 by claudiu.cristea, chx, mikeryan, heddn, phenaproxima: Entity destination ID schema should match entity ID definition"

This reverts commit 3348de12.

Issue #2783715 by claudiu.cristea, chx, mikeryan, heddn, phenaproxima: Entity destination ID schema should match entity ID definition

Issue #2485385 by phenaproxima, quietone, alexpott, mikeryan, Berdir, blazey, xjm, hussainweb, catch, heddn, benjy: Move highwater field support to the source plugin, and do not expose its internals on MigrationInterface

Revert "Issue #2485385 by phenaproxima, quietone, Berdir, blazey, hussainweb, mikeryan, benjy, alexpott: Move highwater field support to the source plugin, and do not expose its internals on MigrationInterface"

This reverts commit 0308eb77.

Issue #2485385 by phenaproxima, quietone, Berdir, blazey, hussainweb, mikeryan, benjy, alexpott: Move highwater field support to the source plugin, and do not expose its internals on MigrationInterface

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2616282 by peter.walter, mikeryan, chx, alexpott: error creating migrate_map table with mysql 5.7.9

Issue #2452217 by mikeryan, sdstyles, benjy: Rename SourcePluginBase::getIterator() and try make protected

Issue #2213451 by andypost, bdone, benjy, penyaskito, chx, claudiu.cristea, damiankloip, gregboggs, InternetDevels, jessehs, jhedstrom, marvil07, mikeryan, pcambra, Xano, YesCT: Update Migrate API in core

Migrate in core #2125717 by mikeryan, chx, marvil07, bdone, jessehs, mpgeek, BTMash, fastangel, mongolito404, Moshe Weitzman, eliza411, YesCT, dawehner, cosmicdreams