Entity instance modified field checks

During test or production mode server startup, PolicyCenter determines whether any of the following immutable fields on any of the following entities have been modified when compared to the last server startup. If it detects a modified field, PolicyCenter adds a message to the server log and fails to start. PublicID and CodeIdentifier are immutable for all entities.

Entity instance	Immutable field
`CoverageCategory`	`PolicyLinePattern`
`CoveragePattern`	`OwningEntityType` `CoverageSymbolGroupPattern` `CoverageSubtype`
`CoverageSymbolGroupPattern`	`PolicyLinePattern`
`CoverageSymbolPattern`	`CoverageSymbolGroupPattern` `CoverageSymbolType`
`CovTermOpt`	`CovTermPattern` `Value` `OptionCode`
`CovTermPack`	`CovTermPattern` `PackageCode`
`DirectCovTermPattern`	`CoveragePattern` `CoverageColumn`
`GenericCovTermPattern`	`CoveragePattern` `CoverageColumn`
`ModifierPattern`	`TypeList` `ModifierSubtype` `ModifierDataType` `SplitOnAnniversary` `PolicyLinePattern` `ScheduleRate`
`OfficialIdPattern`	`PolicyLinePattern` `Interstate` `OfficialIDType` `Scope`
`OptionCovTermPattern`	`CoverageColumn` `CoveragePattern`
`PackageCovTermPattern`	`CoverageColumn` `CoveragePattern`
`PolicyLinePattern`	`PolicyLineSubtype`
`Product`	`Abbreviation` `ProductAccountType`
`Question`	`QuestionSet` `QuestionType` `CorrectAnswer`
`QuestionChoice`	`Question` `ChoiceCode`
`QuestionSet`	`QuestionSetType`
`RateFactorPattern`	`ModifierPattern` `RateFactorType`
`TypekeyCovTermPattern`	`CoverageColumn` `CoveragePattern` `Typefilter` `Typelist`