Fix photos_list attachment. (photo_list before). Some other fixes that was not implemented in api 5.0

Related methods

Returns a list of records from the user or community wall.
Returns a list of records from the walls of users or communities by their identifiers.
Returns data required to show newsfeed for the current user.
<!--COMMENT: (1 of 8) The original translation reads "Returns data required to show comments section in user news." That did not seem clear to me, so I wrote a new description based on that for wall.getComments. Is my rewrite technically correct?-->Returns a list of comments in the current user's newsfeed.
Returns a list of notifications about other users' feedback to the current user's wall posts.