unknown printer metrics property results in empty settings.xml
unknown printer metrics property results in empty settings.xml

regression since 0fd4d12c6233da2ac1936cd89838b006ffec5192

Change-Id: I894fe80f6c531af5c335dc1f3ba1c0ffaca1e07f

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core