getLocale fails with an assertion:
[30 May 2018 09:50:40:956]
SYS_ERR: java.lang.AssertionError
[30 May 2018 09:50:40:956]
SYS_ERR: at com.vaadin.server.VaadinSession.getLocale(VaadinSession.java:543)
[30 May 2018 09:50:40:956]
SYS_ERR: at com.vaadin.ui.AbstractComponent.getLocale(AbstractComponent.java:344)
[30 May 2018 09:50:40:956]
SYS_ERR: at com.vaadin.data.ValueContext.findLocale(ValueContext.java:123)
[30 May 2018 09:50:40:956]
SYS_ERR: at com.vaadin.data.ValueContext.<init>(ValueContext.java:95)
[30 May 2018 09:50:40:956]
SYS_ERR: at com.vaadin.data.Binder$BindingImpl.createValueContext(Binder.java:1125)
[30 May 2018 09:50:40:956]
SYS_ERR: at com.vaadin.data.Binder$BindingImpl.convertDataToFieldType(Binder.java:1151)
[30 May 2018 09:50:40:956]
SYS_ERR: at com.vaadin.data.Binder$BindingImpl.initFieldValue(Binder.java:1143)
[30 May 2018 09:50:40:956]
SYS_ERR: at com.vaadin.data.Binder$BindingImpl.access$100(Binder.java:995)
[30 May 2018 09:50:40:956]
SYS_ERR: at com.vaadin.data.Binder.lambda$setBean$1(Binder.java:1649)
[30 May 2018 09:50:40:956]
SYS_ERR: at java.util.ArrayList.forEach(ArrayList.java:1257)
[30 May 2018 09:50:40:956]
SYS_ERR: at com.vaadin.data.Binder.setBean(Binder.java:1649)
[30 May 2018 09:50:40:956]
SYS_ERR: at com.mrv.provision.pv3.property.model.PojoModel.prepare(PojoModel.java:323)