Importing operator from plugin in multiple modules doesn't work

[bentsherman]

When importing an operator from a plugin, if you import anything from the same plugin in a different module, it fails with the following error:

nextflow/modules/nextflow/src/main/groovy/nextflow/plugin/extension/PluginExtensionProvider.groovy

Lines 137 to 139 in f1cffd1

	if( existing.getClass().getName() != ext.getClass().getName() ) {
	throw new IllegalStateException("Operator '$realName' conflict - it's defined by plugin ${pluginId} and ${existing.pluginId}")
	}

It seems to import the operator twice and reports duplicate operators. It only seems to happen with operators, not factories or functions.

Here is a minimal test case: https://github.com/human9/nextflow-import-issue

Source: nextflow-io/nf-schema#3