Fix error when accessing a published document without access to the live document in workspaces

Trying to display information about other places where doc is published, it crashes with given error:

Caused by: javax.el.ELException: /incl/summary/publication.xhtml @78,87 value="#

{publishActions.getPublishedDocumentsFor(tree.name)}

": org.nuxeo.ecm.core.api
.DocumentSecurityException: Privilege 'Read' is not granted to 'Guest'
at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:74)
at org.nuxeo.ecm.platform.ui.web.binding.MethodValueExpression.getValue(MethodValueExpression.java:112)
at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:40)
at org.jboss.el.parser.AstEqual.getValue(AstEqual.java:21)
at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
... 82 more
Caused by: org.nuxeo.ecm.core.api.DocumentSecurityException: Privilege 'Read' is not granted to 'Guest'
at org.nuxeo.ecm.core.api.AbstractSession.checkPermission(AbstractSession.java:293)
at org.nuxeo.ecm.core.api.AbstractSession.getDocument(AbstractSession.java:1086)
at sun.reflect.GeneratedMethodAccessor294.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:57)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)

...
at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:206)
at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:119)
at $Proxy215.getDocument(Unknown Source)
at org.nuxeo.ecm.platform.publisher.impl.core.SectionPublicationTree.getExistingPublishedDocument(SectionPublicationTree.java:56)
at org.nuxeo.ecm.platform.publisher.impl.service.PublisherServiceImpl.getExistingPublishedDocument(PublisherServiceImpl.java:395)
at org.nuxeo.ecm.platform.publisher.impl.service.AbstractRemotableTree.getExistingPublishedDocument(AbstractRemotableTree.java:41)
at org.nuxeo.ecm.platform.publisher.web.PublishActionsBean.getPublishedDocumentsFor(PublishActionsBean.java:250)
at sun.reflect.GeneratedMethodAccessor963.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:166)
at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:102)
at org.nuxeo.ecm.platform.publisher.web.PublishActionsBean_$$javassist_54.getPublishedDocumentsFor(PublishActionsBean$$_javassist_54.java)
at sun.reflect.GeneratedMethodAccessor962.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:274)
at org.jboss.el.parser.AstMethodSuffix.getValue(AstMethodSuffix.java:59)
at org.jboss.el.parser.AstMethodSuffix.invoke(AstMethodSuffix.java:65)
at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)