Validation doesn't consider loaded IG immediately

[volodymyr-korzh]

After loading an IG, it is not immediately used by validation

Steps To Reproduce

1. Add fhir_endpoint request validation and a validation dependency to persistence.
2. Try to persist a not-IG-compliant resource (uses a profile from an IG not yet loaded). Returns correct error: profile doesn’t exist.
3. load the UKCore IG (adjust url to your file location)
4. Try to persist same resource again. Returns incorrect error: profile doesn’t.

Requests Examples:

1. module.fhir_endpoint.config.request_validating.enabled=true
2. POST http://localhost:8000/Patient with UKCore-Patient profile.

{
  "resourceType": "Patient",
  "meta": {
		"profile": ["https://fhir.nhs.uk/R4/StructureDefinition/UKCore-Patient" ]
	},
  "identifier": [ { "system": "https://fhir.nhs.uk/Id/nhs-number" } ],
  "name": [ {
      "family": "Chalmers123",
      "given": [ "Peter", "James" ]
  } ],
  "gender": "male",
  "birthDate": "1974-01-13",
  "address": [ {
      "line": [ "534 Erewhon St" ],
      "city": "PleasantVille",
      "state": "Vic",
      "postalCode": "3999"
  } ]
}

3. PUT http://localhost:8002/write/install/by-spec

{
  "name": "UK.Core.r4",
  "version": "1.1.0",
  "devDependencies": null,
  "canonicals": null,
  "fhirVersions": [
    "4.0.1"
  ],
  "url":"file://Users/path_to_project/hapi-fhir/hapi-fhir-jpaserver-test-utilities/src/main/resources/packages/UK.Core.r4-1.1.0.tgz"
}

Actual result
Error returns that profile does not exist (same as in 2.)

Response Example:

{
	"resourceType": "OperationOutcome",
	"issue": [
		{
			"severity": "error",
			"code": "processing",
			"details": {
				"coding": [
					{
						"system": "http://hl7.org/fhir/java-core-messageId",
						"code": "VALIDATION_VAL_PROFILE_UNKNOWN_NOT_POLICY"
					}
				]
			},
			"diagnostics": "Profile reference 'https://fhir.nhs.uk/R4/StructureDefinition/UKCore-Patient' has not been checked because it is unknown, and the validator is set to not fetch unknown profiles",
			"location": [
				"Patient.meta.profile[0]",
				"Line 1, Col 2"
			]
		}
	]
}

Expected behavior
Error should be returned indicating no-compliance.

Response Example:

{
	"resourceType": "OperationOutcome",
	"issue": [
		{
			"severity": "error",
			"code": "processing",
			"details": {
				"coding": [
					{
						"system": "http://hl7.org/fhir/java-core-messageId",
						"code": "Validation_VAL_Profile_Minimum"
					}
				]
			},
			"diagnostics": "Patient.identifier:nhsNumber.extension:nhsNumberVerificationStatus: minimum required = 1, but only found 0 (from https://fhir.nhs.uk/R4/StructureDefinition/UKCore-Patient|1.0.0)",
			"location": [
				"Patient.identifier[0]",
				"Line 6, Col 68"
			]
		},
		{
			"severity": "error",
			"code": "processing",
			"details": {
				"coding": [
					{
						"system": "http://hl7.org/fhir/java-core-messageId",
						"code": "Validation_VAL_Profile_Minimum"
					}
				]
			},
			"diagnostics": "Patient.identifier:nhsNumber.value: minimum required = 1, but only found 0 (from https://fhir.nhs.uk/R4/StructureDefinition/UKCore-Patient|1.0.0)",
			"location": [
				"Patient.identifier[0]",
				"Line 6, Col 68"
			]
		}
	]
}