Look for presence of acli_key in cloud_api.conf

[joegl]

blt-sws currently expects cloud_api.conf to be formatted like:

{"key":"ACQUIA KEY HERE","secret":"ACQUIA SECRET HERE"}

ACLI re-writes cloud_api.conf to look like:

array(4) {
  ["keys"]=>
  object(stdClass)#1050 (1) {
    ["ACQUIA KEY HERE"]=>
    object(stdClass)#1057 (3) {
      ["secret"]=>
      string(44) "ACQUIA SECRET HERE"
      ["uuid"]=>
      string(36) "UUID HERE"
    }
  }
  ["acli_key"]=>
  string(36) "ACQUIA KEY HERE"
}

This attempts to add support for the ACLI formatted way.