Fixes Flaky tests

[HildoYe]

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There a several flaky tests and this PR fixes those. The problems are entirely ordering issues, and the proposed solutions is mainly to use annotations @JsonPropertyOrder.

The flakiness can be test with mvn -pl . edu.illinois:nondex-maven-plugin:1.1.2:nondex -Dtest=TESTNAME

Tests fixed:

• config.CustomHypermediaWebFluxTest#getUsingCustomMediaType
• config.CustomHypermediaWebMvcTest#getUsingCustomMediaType
• EntityModelIntegrationTest#inlinesContent
• IanaLinkRelationUnitTest#testAllIanaLinkRelationsHaveStringConstant
• Jackson2LinkIntegrationTest#writesLinkCorrectly
• Jackson2ResourceSupportIntegrationTest#doesNotRenderId
• Jackson2ResourceIntegrationTest#inlinesContent
• Jackson2PagedResourcesIntegrationTest#serializesPagedResourcesCorrectly
• mediatype.collectionjson.Jackson2CollectionJsonIntegrationTest#renderComplexStructure
• mediatype.collectionjson.Jackson2CollectionJsonIntegrationTest#renderSimplePojos
• mediatype.collectionjson.Jackson2CollectionJsonIntegrationTest#rendersMultipleLinkAsArray
• mediatype.collectionjson.Jackson2CollectionJsonIntegrationTest#serializesPagedResource
• mediatype.hal.forms.HalFormsObjectMapperCustomizerTest#objectMapperCustomizerShouldBeApplied
• mediatype.hal.forms.Jackson2HalFormsIntegrationTest#rendersTitleIfMessageSourceResolvesLocalKey
• mediatype.hal.forms.Jackson2HalFormsIntegrationTest#rendersTitleIfMessageSourceResolvesNamespacedKey
• mediatype.hal.forms.Jackson2HalFormsIntegrationTest#rendersCuriesCorrectly
• mediatype.hal.forms.Jackson2HalFormsIntegrationTest#rendersMultipleResourceResourcesAsEmbedded
• mediatype.hal.forms.Jackson2HalFormsIntegrationTest#rendersRepresentationModelWithTemplates
• mediatype.hal.forms.Jackson2HalFormsIntegrationTest#rendersMultipleCuries
• mediatype.hal.forms.Jackson2HalFormsIntegrationTest#rendersResource
• mediatype.hal.forms.Jackson2HalFormsIntegrationTest#serializesAnnotatedResourceResourcesAsEmbedded
• mediatype.hal.forms.Jackson2HalFormsIntegrationTest#serializesMultipleAnnotatedResourceResourcesAsEmbedded
• mediatype.hal.forms.Jackson2HalFormsIntegrationTest#serializesPagedResource
• mediatype.hal.Jackson2HalIntegrationTest#rendersTitleIfMessageSourceResolvesLocalKey
• mediatype.hal.Jackson2HalIntegrationTest#rendersTitleIfMessageSourceResolvesNamespacedKey
• mediatype.hal.Jackson2HalIntegrationTest#rendersAllExtraRFC8288Attributes
• mediatype.hal.Jackson2HalIntegrationTest#rendersMultipleCuries
• mediatype.hal.Jackson2HalIntegrationTest#rendersMultipleResourceResourcesAsEmbedded
• mediatype.hal.Jackson2HalIntegrationTest#serializesAnnotatedResourceResourcesAsEmbedded
• mediatype.hal.Jackson2HalIntegrationTest#serializesPagedResource
• mediatype.hal.HalModelBuilderUnitTest#previewForLinkRelationsUsingHalModelBuilder
• mediatype.hal.HalModelBuilderUnitTest#progressivelyAddingContentUsingHalModelBuilder
• mediatype.hal.HalModelBuilderUnitTest#renderDifferentlyTypedEntities
• mediatype.hal.HalModelBuilderUnitTest#renderExplicitAndImplicitLinkRelations
• mediatype.hal.HalModelBuilderUnitTest#renderSingleItemUsingDefaultModelBuilder
• mediatype.hal.HalModelBuilderUnitTest#renderSingleItemUsingHalModelBuilder
• mediatype.hal.HalModelBuilderUnitTest#embeddedSpecUsingHalModelBuilder
• mediatype.hal.HalObjectMapperCustomizerTest#objectMapperCustomizerShouldBeApplied
• mediatype.problem.JacksonSerializationTest#extensionSerialize
• RepresentationModelIntegrationTest#doesNotRenderId

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