Issue #1799116 by jwilson3: Standardize on installation profile term vs. install profile

core/CHANGELOG.txt

core/includes/common.inc

core/includes/form.inc

core/includes/install.core.inc

core/includes/install.inc

core/includes/module.inc

core/includes/unicode.inc

...es/comment/lib/Drupal/comment/Tests/CommentFieldsTest.php

core/modules/field/lib/Drupal/field/Tests/FieldInfoTest.php

core/modules/overlay/overlay.install

...lib/Drupal/system/Tests/Bootstrap/GetFilenameUnitTest.php

...s/system/lib/Drupal/system/Tests/Module/ModuleApiTest.php

core/modules/system/system.admin.inc

core/modules/system/system.api.php

core/modules/system/system.install

core/modules/system/system.module

...sts/modules/requirements1_test/requirements1_test.install

core/profiles/minimal/minimal.install

core/profiles/standard/standard.install