Fix typos in download-customer-package code

[alroba]

Description of the change

• Discovered a typo that created a file called 1 every time we execute the tool.
  • Fixed changing 2&>1 to 2>&1.
• Added the required ":" to the options with parameters in getopt.

Benefits

Avoid creating an extra file when executing the tool.

getopt will work properly with the long options.

Possible drawbacks

There shouldn't be any

Additional information

While debugging this, we found out the following:

• We create a file for the customer service account that we might be interested in removing at the end of the script.
• This script won't work on MAC because it uses a different getopt.
  • It will work if we install gnu-getopt over the default getopt.
  • We can create a warning in the documentation (even though we specifically require a Linux machine to execute this script).

[alroba]

The getopt vs gnu-getopt in Mac already affected a customer (Indosat): https://carto.zendesk.com/agent/tickets/86771