add generic OSHDBException / add ownership and cluster state check to OSHDBIgnite

[rtroilo]

Adds a generic OSHDBException class.
Adds ownership and cluster state check to OSHDBIgnite.

Corresponding issue

Closes #337

Checklist

• My code follows the code-style rules, and I have checked on the static analyses and benchmark (if applicable) results
• I have commented my code
• I have written javadoc (required for public classes and methods)
• I have added sufficient unit tests
• I have made corresponding changes to the documentation
• I have updated the CHANGELOG.md
• I have adjusted the examples or created an issue in the corresponding repository
• I have adjusted the benchmark or created an issue in the corresponding repository