ansible-lint fixes

1 job for master in 21 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #10046
ansible-lint

00:00:21

 
Name Stage Failure
failed
ansible-lint Test
      52:3      error    wrong indentation: expected 4 but found 2  (indentation)
73:58 error trailing spaces (trailing-spaces)
79:1 error too many blank lines (2 > 0) (empty-lines)

/builds/webarch/nextcloud/meta/main.yml
6:3 error wrong indentation: expected 4 but found 2 (indentation)
8:5 error wrong indentation: expected 6 but found 4 (indentation)

ERROR: Job failed: exit code 1