when random_length > zero, generated name does not comply with readme

[gilles-o]

The readme says:

random_length (optional) - default to 0 : configure additional characters to append to the generated resource name. Random characters will remain compliant with the set of allowed characters per resources and will be appended after the suffixes

The random part is in fact inserted between name and suffixes, which is not the expected behavior.

azurecaf_name "test" {}
  random_length = 5
  name = "some-name"
  suffixes = ["component", "env", "location"]

• produces : "rg-some-name-rqxik-component-env-location"
• Expected name (per readme): "rg-some-name-component-env-location-rqxik"

azurecaf_name "test" {}
  random_length = 5
  name = ""
  suffixes = ["some-name", "component", "env", "location"]

• produces : "rg-rqxik-some-name-component-env-location"
• Expected name (per readme): "rg-some-name-component-env-location-rqxik"

Suggested fix: change the components order (but will induce a breaking change) or change the doc

[arnaudlh]

good feeback @gilles-o, amended the doc!.