Fix indentation of generated constraints and templates

[andreidum]

Generated constraints and templates should be indented so that they pass linting. Currently, they fail with:

yamllint .
./constraint.yaml
  1:1       warning  missing document start "---"  (document-start)
  8:5       error    wrong indentation: expected 6 but found 4  (indentation)
  9:7       error    wrong indentation: expected 8 but found 6  (indentation)
  12:7      error    wrong indentation: expected 8 but found 6  (indentation)

./template.yaml
  1:1       warning  missing document start "---"  (document-start)
  12:3      error    wrong indentation: expected 4 but found 2  (indentation)
  13:5      error    wrong indentation: expected 6 but found 4  (indentation)
  75:81     error    line too long (110 > 80 characters)  (line-length)
  131:81    error    line too long (139 > 80 characters)  (line-length)

[jalseth]

Hi, thank you for the report. The YAML files are valid and are generated from structs using github.com/ghodss/yaml. In this case, we will not be making changes to accomodate an opinionated linter.