We can read the package information from two places
- The EPM registry (method `getRegistryPackage()`)
- The local ES cache (method `getEsPackage()`)

The package contains a property called `data_streams`. The contents of
this property varied depending on from where the package was being
loaded. The code in `getEsPackage` was cherry-picking what properties to
load to do validation.

We have changed the code so we cherry-pick only the properties that need
some sort of validation, and pass the others in bulk.

Returns a list of the necessary ES permissions based on the permissions
specified in each data_stream.

If no permissions are specified it returns a default set of permissions
for each data_stream.