SE-127 handle case when two MS_INJECTION samples have the same parent

.../openbis/plugin/phosphonetx/server/PhosphoNetXServer.java

.../plugin/phosphonetx/server/business/AbundanceManager.java

...in/phosphonetx/server/business/BusinessObjectFactory.java

...n/phosphonetx/server/business/IBusinessObjectFactory.java

...sphonetx/server/business/IProteinWithAbundancesTable.java

...plugin/phosphonetx/server/business/ISampleIDProvider.java

...osphonetx/server/business/ProteinWithAbundancesTable.java

.../plugin/phosphonetx/server/business/SampleIDProvider.java

...lugin/phosphonetx/server/dataaccess/IProteinQueryDAO.java

...osphonetx/shared/dto/ProteinReferenceWithProbability.java

...penbis/plugin/phosphonetx/shared/dto/SampleAbundance.java

rtd_phosphonetx/source/sql/postgresql/001/schema-001.png

...nbis/plugin/phosphonetx/server/PhosphoNetXServerTest.java

...gin/phosphonetx/server/business/AbundanceManagerTest.java

...onetx/server/business/ProteinWithAbundancesTableTest.java