Log noise when clicking on an npm package root in the tree UI

If you click on an npm package node in the tree UI a very verbose warning is printed in the log.  There is no need for this to be a warning, it should be logged at DEBUG.

2018-08-14 15:21:38,728-0400 ERROR [qtp545619715-42] nexusadmin org.sonatype.nexus.extdirect.internal.ExtDirectServlet - Failed to invoke action method: healthcheck_AssetDetail.identify, java-method: com.sonatype.nexus.plugins.healthcheck.pro.internal.ui.HealthCheckAssetDetailComponent.identify
java.lang.IllegalArgumentException: Malformed npm component with path ajv. If this is packageRoot, try selecting the tarball instead.
at com.google.common.base.Preconditions.checkArgument(Preconditions.java:210)
at com.sonatype.nexus.plugins.healthcheck.pro.internal.ui.AssetIdentificationService.getNpmComponentIdentifier(AssetIdentificationService.java:163)
at com.sonatype.nexus.plugins.healthcheck.pro.internal.ui.AssetIdentificationService.getComponentIdentifier(AssetIdentificationService.java:137)
at com.sonatype.nexus.plugins.healthcheck.pro.internal.ui.AssetIdentificationService.identify(AssetIdentificationService.java:100)
at com.sonatype.nexus.plugins.healthcheck.pro.internal.ui.AssetIdentificationService$identify.call(Unknown Source)
at com.sonatype.nexus.plugins.healthcheck.pro.internal.ui.HealthCheckAssetDetailComponent.identify(HealthCheckAssetDetailComponent.groovy:47)
at com.palominolabs.metrics.guice.ExceptionMeteredInterceptor.invoke(ExceptionMeteredInterceptor.java:49)
at com.palominolabs.metrics.guice.TimedInterceptor.invoke(TimedInterceptor.java:47)
at org.sonatype.nexus.validation.internal.ValidationInterceptor.invoke(ValidationInterceptor.java:53)
at org.apache.shiro.guice.aop.AopAllianceMethodInvocationAdapter.proceed(AopAllianceMethodInvocationAdapter.java:49)
at org.apache.shiro.authz.aop.AuthorizingAnnotationMethodInterceptor.invoke(AuthorizingAnnotationMethodInterceptor.java:68)
at org.apache.shiro.guice.aop.AopAllianceMethodInterceptorAdapter.invoke(AopAllianceMethodInterceptorAdapter.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.softwarementors.extjs.djn.router.dispatcher.DispatcherBase.invokeJavaMethod(DispatcherBase.java:142)
at com.softwarementors.extjs.djn.router.dispatcher.DispatcherBase.invokeMethod(DispatcherBase.java:133)
at org.sonatype.nexus.extdirect.internal.ExtDirectServlet$3.invokeMethod(ExtDirectServlet.java:236)
at com.softwarementors.extjs.djn.router.dispatcher.DispatcherBase.dispatch(DispatcherBase.java:63)
at com.softwarementors.extjs.djn.router.processor.standard.StandardRequestProcessorBase.dispatchStandardMethod(StandardRequestProcessorBase.java:73)
at com.softwarementors.extjs.djn.router.processor.standard.json.JsonRequestProcessor.processIndividualRequest(JsonRequestProcessor.java:502)
at com.softwarementors.extjs.djn.router.processor.standard.json.JsonRequestProcessor.processIndividualRequestsInThisThread(JsonRequestProcessor.java:150)
at com.softwarementors.extjs.djn.router.processor.standard.json.JsonRequestProcessor.process(JsonRequestProcessor.java:133)
at com.softwarementors.extjs.djn.router.RequestRouter.processJsonRequest(RequestRouter.java:83)
at com.softwarementors.extjs.djn.servlet.DirectJNgineServlet.processRequest(DirectJNgineServlet.java:630)
at com.softwarementors.extjs.djn.servlet.DirectJNgineServlet.doPost(DirectJNgineServlet.java:593)
at org.sonatype.nexus.extdirect.internal.ExtDirectServlet.doPost(ExtDirectServlet.java:141)