fhir-persistence-schema CLI drop-admin does not clear out the fhir_admin schema

[d0roppe]

Describe the bug
when using the fhir-persistence-schema CLI tool to drop-admin the fhir_admin schema is not cleared out. the table in there still remains. and prevents the reuse of the DB for FHIR use.

Environment
Which version of IBM FHIR Server?

To Reproduce
Steps to reproduce the behavior:

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2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
the use of --drop-admin in the fhir-persistence-schema CLI tool should clean out the fhir_admin schema

Additional context
Add any other context about the problem here.

[prb112]

PR https://github.com/IBM/FHIR/pull/2787/files

[d0roppe]

now using fhir-persistence-schema cli to drop fhir_admin does allow you to reuse the schema for a new fhir server with the same fhir schema name.