feature/GH-8499: fix compilation errors

feature-libs/organization/administration/core/model/b2b-user.model.ts

@@ -1,7 +1,9 @@
+import { B2BUnit as CoreB2BUnit} from '@spartacus/core';
+
 declare module '@spartacus/core' {
   interface B2BUser {
     approvers?: [];
-    orgUnit?: B2BUnit;
+    orgUnit?: CoreB2BUnit;
     selected?: boolean;
     isAssignedToApprovers?: boolean;
     email?: string;

feature-libs/organization/administration/core/model/unit.model.ts

@@ -1,13 +1,14 @@
 import { B2BApprovalProcess } from './order-approval.model';
+import { B2BUser as CoreB2BUser} from '@spartacus/core';
 
 declare module '@spartacus/core' {
   interface B2BUnit {
     parentOrgUnit?: Partial<B2BUnit>;
     approvalProcess?: B2BApprovalProcess;
-    administrators?: B2BUser[];
-    approvers?: B2BUser[];
-    customers?: B2BUser[];
+    administrators?: CoreB2BUser[];
+    approvers?: CoreB2BUser[];
+    customers?: CoreB2BUser[];
     costCenters?: CostCenter[];
-    managers?: B2BUser[];
+    managers?: CoreB2BUser[];
   }
 }

projects/core/public_api.ts

@@ -34,7 +34,5 @@ export * from './src/lazy-loading/index';
 export { Product } from './src/model/product.model';
 export { ProductSearchPage, Facet } from './src/model/product-search.model';
 export { Cart } from './src/model/cart.model';
-export { CostCenter } from './src/model/org-unit.model';
-export { B2BUnit } from './src/model/org-unit.model';
-export { B2BUser } from './src/model/org-unit.model';
+export { CostCenter, B2BUnit, B2BUser } from './src/model/org-unit.model';
 /** AUGMENTABLE_TYPES_END */