[ticket/12115] Convert user occupation to a profile field

PHPBB3-12115
[ticket/12115] Add language entries for the profile fields

PHPBB3-12115
[ticket/12115] Remove occupation field from html files

PHPBB3-12115
[ticket/12115] Translate profile field name before displaying it in errors

PHPBB3-12115
[ticket/12115] Add methods to interface

PHPBB3-12115
[ticket/12115] Remove old language strings

PHPBB3-12115
[ticket/12115] Also port user interests to profile fields

PHPBB3-12115
[ticket/12115] Add a new migration for profilefield_interests

With this we avoid missing to copy one, when the admin already created
a phpbb_* profile field.

PHPBB3-12115
[ticket/12115] Use base class to reduce duplicate code

PHPBB3-12115
[ticket/12115] Add migration file to remove old user columns

PHPBB3-12115
[ticket/12115] Remove space from line ending

PHPBB3-12115
[ticket/12141] Disable opcache on travis for php 5.5.8 aswell

PHPBB3-12141
Merge pull request #2017 from nickvergessen/ticket/12141

[ticket/12141] Disable opcache on travis for php 5.5.8 aswell

* nickvergessen/ticket/12141:
  [ticket/12141] Disable opcache on travis for php 5.5.8 aswell
[ticket/12175] Fix upload test for empty file

PHPBB3-12175
[ticket/12175] Fix test for uploading a valid file

PHPBB3-12175
[ticket/12175] Do not use admin account for file size limit test

PHPBB3-12175
Merge pull request #2022 from nickvergessen/ticket/12175

Ticket/12175 Fix and run functional upload tests

* nickvergessen/ticket/12175:
  [ticket/12175] Do not use admin account for file size limit test
  [ticket/12175] Fix test for uploading a valid file
  [ticket/12175] Fix upload test for empty file
Merge pull request #1988 from nickvergessen/ticket/12115

[ticket/12115] Convert occupation profile field to custom field