update validation logic

Author: jloleysens

x-pack/plugins/index_lifecycle_management/public/application/services/policies/cold_phase.ts

@@ -152,9 +152,9 @@ export const validateColdPhase = (phase: ColdPhase): PhaseValidationErrors<ColdP
 
   // min age needs to be a positive number
   if (!isNumber(phase.selectedMinimumAge)) {
-    phaseErrors.phaseIndexPriority = [numberRequiredMessage];
+    phaseErrors.selectedMinimumAge = [numberRequiredMessage];
   } else if (parseInt(phase.selectedMinimumAge, 10) < 0) {
-    phaseErrors.phaseIndexPriority = [positiveNumberRequiredMessage];
+    phaseErrors.selectedMinimumAge = [positiveNumberRequiredMessage];
   }
 
   return { ...phaseErrors };

x-pack/plugins/index_lifecycle_management/public/application/services/policies/frozen_phase.ts

@@ -152,9 +152,9 @@ export const validateFrozenPhase = (phase: FrozenPhase): PhaseValidationErrors<F
 
   // min age needs to be a positive number
   if (!isNumber(phase.selectedMinimumAge)) {
-    phaseErrors.phaseIndexPriority = [numberRequiredMessage];
+    phaseErrors.selectedMinimumAge = [numberRequiredMessage];
   } else if (parseInt(phase.selectedMinimumAge, 10) < 0) {
-    phaseErrors.phaseIndexPriority = [positiveNumberRequiredMessage];
+    phaseErrors.selectedMinimumAge = [positiveNumberRequiredMessage];
   }
 
   return { ...phaseErrors };