[pulsar-admin] Check validity of --compatibility for namespace

[yuruguo]

Motivation

We should check the validity of the --compatibility and give a more friendly prompt message when set schema compatibility strategy for namespace through ./bin/pulsar-admin namespaces set-schema-compatibility-strategy.
Currently, the lack of verification for --compatibility will directly display the exception, as below:

./bin/pulsar-admin namespaces set-schema-compatibility-strategy -c ALWAYS_COMPATIBE tenant1/ns1
java.lang.IllegalArgumentException: No enum constant org.apache.pulsar.common.policies.data.SchemaCompatibilityStrategy.ALWAYS_COMPATIBE
	at java.lang.Enum.valueOf(Enum.java:238)
	at org.apache.pulsar.common.policies.data.SchemaCompatibilityStrategy.valueOf(SchemaCompatibilityStrategy.java:24)
	at org.apache.pulsar.admin.cli.CmdNamespaces$SetSchemaCompatibilityStrategy.run(CmdNamespaces.java:1833)
	at org.apache.pulsar.admin.cli.CmdBase.run(CmdBase.java:86)
	at org.apache.pulsar.admin.cli.PulsarAdminTool.run(PulsarAdminTool.java:282)
	at org.apache.pulsar.admin.cli.PulsarAdminTool.main(PulsarAdminTool.java:329)

Modifications

• Throw ParameterException when IllegalArgumentException occurs when executing SchemaCompatibilityStrategy.valueOf()

Documentation

Automatically generate doc through code

• doc

[eolivelli]

Lgtm

@yuruguo you don't need to tag so many people.
Github is open to everyone and who has time to do some reviews will be happy to review your code.

If you want you can ping me on slack using DM

[yuruguo]

Lgtm

@yuruguo you don't need to tag so many people. Github is open to everyone and who has time to do some reviews will be happy to review your code.

If you want you can ping me on slack using DM

I'm sorry to interrupt you, because many PRs I submitted have been in unreviewed state or the number of approved people (at least two) is not enough for a long time, so I ping many person. I will pay attention to this later.
In addition, thank you very much for telling me the way of communication, I will try to use it later :).