[LMS-1894] got rid of warnings (yeastx)

...osphonetx/shared/basic/dto/AbundanceColumnDefinition.java

...phosphonetx/shared/basic/dto/AccessionNumberProvider.java

...lugin/phosphonetx/shared/basic/dto/AggregateFunction.java

...s/plugin/phosphonetx/shared/basic/dto/DataSetProtein.java

.../openbis/plugin/phosphonetx/shared/basic/dto/Peptide.java

...s/plugin/phosphonetx/shared/basic/dto/ProteinDetails.java

...nbis/plugin/phosphonetx/shared/basic/dto/ProteinInfo.java

.../plugin/phosphonetx/shared/basic/dto/ProteinSequence.java

...s/plugin/phosphonetx/shared/basic/dto/ProteinSummary.java

...tx/shared/basic/dto/SampleWithPropertiesAndAbundance.java

...penbis/plugin/phosphonetx/shared/basic/dto/Treatment.java