[ticket/9341] Correctly named template vars

PHPBB3-9341
[ticket/9341] Use U_PREVIOUS and U_NEXT in template files

PHPBB3-9341
[ticket/9341] Move create_topic and post into functional test case

create_topic and create_post are moved into functional test case
so that they can be used by other tests as well

PHPBB3-9341
[ticket/9341] Add tests for checking Next and Previous template vars

PHPBB3-9341
[ticket/10838] Updated RUNNING_TESTS.md

PHPBB3-10838
[ticket/9341] remove PREV_PAGE tpl var used for backward compatability

PHPBB3-9341
[ticket/9341] Follow the Next/Prev link in tests
follow the next/prev link and then assert if the page contains
its last post or not

PHPBB3-9341
[ticket/9341] Assert that page doesnt contain next or prev page posts

PHPBB3-9341
[ticket/11593] initialize $is_expr as null before being passed to get_varref

PHPBB3-11593
Merge remote-tracking branch 'dhruvgoel92/ticket/11593' into develop

* dhruvgoel92/ticket/11593:
  [ticket/11593] initialize $is_expr as null before being passed to get_varref
Merge remote-tracking branch 'dhruvgoel92/ticket/9341' into develop

* dhruvgoel92/ticket/9341:
  [ticket/9341] Assert that page doesnt contain next or prev page posts
  [ticket/9341] Follow the Next/Prev link in tests follow the next/prev link and then assert if the page contains its last post or not
  [ticket/9341] remove PREV_PAGE tpl var used for backward compatability
  [ticket/9341] Add tests for checking Next and Previous template vars
  [ticket/9341] Move create_topic and post into functional test case
  [ticket/9341] Use U_PREVIOUS and U_NEXT in template files
  [ticket/9341] Correctly named template vars
[ticket/11566] add interface for captcha

Add basic captcha template while reporting post
when the user is not a registered user.

PHPBB3-11566
[ticket/11566] add error functionality

add $error which stores the captcha error when captcha validation fails

PHPBB3-11566
[ticket/11566] add error in template

Check if error exists, then display it
in the report post template.

PHPBB3-11566
[ticket/11566] display error instead of trigger_error

When the error report is empty display error
in the template instead of trigger_error

PHPBB3-11566
[ticket/11566] add captcha reset and hidden fields

If captcha is solved and some other error pops up, store the
captcha in a hidden field.
Reset captcha if reporting the post is successful

PHPBB3-11566
[ticket/11566] add tests for reporting post

Functional test for reporting post and check if captcha validation
is required for guests and not for registerted users

PHPBB3-11566
[ticket/11566] Use language variable instead of hardcode

Add language variable in tests

PHPBB3-11566
[ticket/11566] Revert forum permission changes

Revert the f_report permission for guests in the functional tests

PHPBB3-11566
[ticket/11566] Rename var to $visual_confirmation_response

PHPBB3-11566