Issue #1430452 by Cottser: Make core module names use Proper Noun Case

core/MAINTAINERS.txt

core/modules/contextual/contextual.info

core/modules/contextual/contextual.module

core/modules/dblog/dblog.info

core/modules/dblog/dblog.module

core/modules/dblog/dblog.test

core/modules/field/field.module

...es/field/modules/field_sql_storage/field_sql_storage.info

.../field/modules/field_sql_storage/field_sql_storage.module

...es/field/modules/field_sql_storage/field_sql_storage.test

core/modules/locale/locale.module

core/modules/php/php.info

core/modules/php/php.module

core/modules/system/system.install

core/modules/system/system.module

core/modules/system/system.test

core/modules/translation/translation.info

core/modules/translation/translation.module

core/modules/update/update.info

core/modules/update/update.module