Keep symlinks

Fix up the keep_symlinks option from file.recurse

#10809

[root@salt salt]# cat test.sls 
/srv/test/:
  file:
    - recurse
    - source: salt://test
    - keep_symlinks: True                                                   
    - include_empty: True
[root@salt salt]# ls -l test
total 4
lrwxrwxrwx. 1 root root   26 Feb 27 03:35 mysql -> /root/mysql-formula/mysql/
drwxr-xr-x. 2 root root 4096 Feb 27 06:53 this
lrwxrwxrwx. 1 root root   11 Feb 27 06:53 this.sls -> ../test.sls
[root@salt salt]# salt 'web1*' state.sls test
web1.gtmanfred.com:
----------
          ID: /srv/test/
    Function: file.recurse
      Result: True
     Comment: Recursively updated /srv/test/
     Changes:   
              ----------
              /srv/test/mysql:
                  ----------
                  new:
                      /srv/test/mysql
              /srv/test/this:
                  ----------
                  /srv/test/this:
                      New Dir
              /srv/test/this.sls:
                  ----------
                  new:
                      /srv/test/this.sls
              /srv/test/this/file:
                  ----------
                  diff:
                      New file
                  mode:
                      0644

Summary
------------
Succeeded: 1
Failed:    0
------------
Total:     1
[root@salt salt]# salt 'web1*' cmd.run 'ls -l /srv/test'
web1.gtmanfred.com:
    total 4
    lrwxrwxrwx 1 root root   26 Feb 27 06:54 mysql -> /root/mysql-formula/mysql/
    drwxr-xr-x 2 root root 4096 Feb 27 06:54 this
    lrwxrwxrwx 1 root root   11 Feb 27 06:54 this.sls -> ../test.sls