Configure sandbox to use secure storage by default
In order to enable the secure storage APIs in sandbox, the user needs to modify cdap-site.xml and add a cdap-security.xml in the conf directory. Though sandbox users probably don't care that much about secure storage for security reasons, they could still care about them when testing pipelines or using the new cloud APIs.
We should configure the sandbox to use the file storage provider with some dummy password, and descriptive information in cdap-security about what it is there for.
Configured sandbox to have secure store APIs enabled by default