Issue #1799116 by jwilson3: Standardize on installation profile terminology

CHANGELOG.txt

INSTALL.txt

includes/common.inc

includes/form.inc

includes/install.core.inc

includes/install.inc

includes/module.inc

includes/unicode.inc

includes/update.inc

modules/comment/comment.test

modules/overlay/overlay.install

modules/simpletest/tests/module.test

modules/simpletest/tests/requirements1_test.install

modules/system/system.admin.inc

modules/system/system.api.php

modules/system/system.install

modules/system/system.module

profiles/minimal/minimal.install

profiles/standard/standard.install