added bean config for token provisioning

(cherry picked from commit 0b11318f)

provider/indexer-gcp/src/main/java/org/opengroup/osdu/indexer/util/ServiceAccountJwtGcpClientImpl.java

+/*
+ *  Copyright 2020-2022 Google LLC
+ *  Copyright 2020-2022 EPAM Systems, Inc
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package org.opengroup.osdu.indexer.util;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.opengroup.osdu.core.auth.TokenProvider;
+import org.opengroup.osdu.core.common.util.IServiceAccountJwtClient;
+import org.springframework.stereotype.Component;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class ServiceAccountJwtGcpClientImpl implements IServiceAccountJwtClient {
+
+    private final TokenProvider tokenProvider;
+
+    @Override
+    public String getIdToken(String tenantName) {
+        log.debug("Tenant name received for auth token is: {}", tenantName);
+        return "Bearer " + tokenProvider.getIdToken();
+    }
+}