[MPLUGIN-377] Drop use of legacy APIs

[jira-importer]

Tamas Cservenak opened MPLUGIN-377 and commented

The maven-plugin-tools uses bits of maven-compat, that really should not (maven-compat is maven2 support).

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Issue Links:

• MPLUGIN-384 Nexus Staging Plugin - incompatibility
  ("causes")

• MNG-7266 Remove maven-compat module

• MNG-7385 Improve documentation on repository metadata

• MNG-7375 Potential NPE in o.a.m.artifact.repository.metadata.Metadata.merge(...) with invalid/incomplete plugin metadata
  ("breaks")

Remote Links:

• GitHub Pull Request #37
  
• PR #37