JIRA Data Center Azure templates don't escape deployment parameters properly

Summary

The install script for Jira's Azure deployment doesn't properly escape input parameters. If a variable contains a dollar sign, it will be incorrectly evaluated by bash, and the value that ends up in the Jira configuration may not be the value specified by the user.

The install script needs to escape parameters properly so that they are always treated as data, not code.

Environment

Jira Software Data Center on Azure (using the official Azure deployment scripts).

Steps to reproduce

Following the deployment instructions in atlassian-azure-deployment, deploy a cluster with a parameter containing a dollar sign (e.g. the database password).

Expected result

Jira starts up correctly and can access the database (the specified password is output correctly in the dbconfig.xml).

Actual result

The database password in dbconfig.xml does not match the input parameter.

Workaround

Manually update the incorrectly created configuration files (e.g. SSH into each node, and update dbconfig.xml with the proper values).