Better analyze of why an attribute is not archived in getErrorMessageForAttribute

src/main/java/HdbArchiver/Collector/HdbCollector.java

src/main/java/HdbArchiver/Collector/HdbCollectorFactory.java

src/main/java/HdbArchiver/Collector/image/Image_RO.java

...main/java/HdbArchiver/Collector/scalar/BooleanScalar.java

src/main/java/HdbArchiver/Collector/scalar/NumberScalar.java

src/main/java/HdbArchiver/Collector/scalar/StringScalar.java

...va/HdbArchiver/Collector/spectrum/BooleanSpectrum_RO.java

...va/HdbArchiver/Collector/spectrum/BooleanSpectrum_RW.java

...ava/HdbArchiver/Collector/spectrum/NumberSpectrum_RO.java

...ava/HdbArchiver/Collector/spectrum/NumberSpectrum_RW.java

...ava/HdbArchiver/Collector/spectrum/StringSpectrum_RO.java

...ava/HdbArchiver/Collector/spectrum/StringSpectrum_RW.java

src/main/java/HdbArchiver/HdbArchiver.java

src/main/java/TdbArchiver/Collector/TdbCollector.java

src/main/java/TdbArchiver/Collector/TdbCollectorFactory.java

src/main/java/TdbArchiver/Collector/image/Image_RO.java

...main/java/TdbArchiver/Collector/scalar/BooleanScalar.java

src/main/java/TdbArchiver/Collector/scalar/NumberScalar.java

src/main/java/TdbArchiver/Collector/scalar/StateScalar.java

src/main/java/TdbArchiver/Collector/scalar/StringScalar.java