Issue #2451363 by alexpott, Berdir, pjcdawkins: Ensure install_profile is exists in settings.php after installation

Issue #2212069 by Gábor Hojtsy, pjonckiere, rteijeiro, cilefen: Non-English Drupal sites get default configuration in English, edited in English, originals not actually used if translated

Issue #2458925 by alexpott: Screen is black and completely unreadable in Configure page after install on standard profile

Issue #2090115 by alexpott, xjm: Don't install a module when its default configuration has unmet dependencies

Issue #2382195 by tibbsa, subhojit777, tadityar, cilefen, Mile23: Clean-up simpletest module test members - ensure property definition and use of camelCase naming convention

Issue #1993452 by Gábor Hojtsy, YesCT, bannorb, rvilar, Pancho, Sutharsan, Albert Volkman: Fix confusing UX by merging "Translate configuration" into "Finish translations" task

Issue #2143729 by tstoeckler, plach, jsbalsera, Berdir, mauzeh, damiankloip, andypost: Entity definitions miss a language entity key

Issue #2352081 by myforgedoteu, Devin Carlson, martin107: Prevent installation over an already installed database

Issue #2347999 by Mile23, daffie, cs_shadow, cosmicdreams: DrupalUnitTestBase is deprecated, replace with KernelTestBase

Issue #1074108 by pwolanin, webchick, BlakeLawson, jayeshanandani, Devin Carlson, harijari, David_Rothstein, c_lehel, Haza, oriol_e9g: Profile selection form not skipped if there is only one visible profile

Issue #2350823 by lauriii, jhedstrom, Tim Bozeman, cilefen, davidhernandez, inqui, Cottser, xjm: Use the Classy theme in the Testing profile

Issue #2376147 by alexpott, joelpittet, amateescu: Installer is missing all of the global Seven theme stylesheets

Issue #2328111 by dawehner, martin107, neclimdul: Replace most instances of the DRUPAL_ROOT constant with the app.root container parameter.

Issue #2349263 by Désiré, zaporylie, hansfn: Fixed Add support for semantic version numbers in installer.

Issue #2336743 by webflo, penyaskito, YesCT, Gábor Hojtsy: Fixed When more than one language is added in the profile, the installer ignores those.

Issue #2331991 by Gábor Hojtsy, vijaycs85, dawehner: Tests for Theme missing when installing in non-English language.

Issue #1974048 by Gábor Hojtsy, vijaycs85, er.pushpinderrana, Sutharsan, penyaskito, bserem: Fixed Limited display of languages when going back in installer is confusing.

Issue #2323259 by Sutharsan, vijaycs85, Gábor Hojtsy: Fixed Local translation file detection is not semantic version compatible.

Issue #697760 by sun: Replace getInfo() in tests with native phpDoc + annotations (following PHPUnit).