migrate indexer to spring boot/cloud

.idea/$PRODUCT_WORKSPACE_FILE$

.idea/.gitignore

.idea/sbt.xml

indexer-service-azure/pom.xml

indexer-service-gcp/pom.xml

.../main/java/org/opendes/indexer/publish/PublisherImpl.java

...c/main/java/org/opendes/indexer/util/RequestInfoImpl.java

indexer-service-root/maven/settings.xml

indexer-service-root/pom.xml

...src/main/java/org/opendes/indexer/IndexerApplication.java

...src/main/java/org/opendes/indexer/ServletInitializer.java

...src/main/java/org/opendes/indexer/api/HealthCheckApi.java

...c/main/java/org/opendes/indexer/api/RecordIndexerApi.java

...oot/src/main/java/org/opendes/indexer/api/ReindexApi.java

.../src/main/java/org/opendes/indexer/cache/SchemaCache.java

...rc/main/java/org/opendes/indexer/logging/AuditEvents.java

...rc/main/java/org/opendes/indexer/logging/AuditLogger.java

...c/main/java/org/opendes/indexer/logging/ServiceLogId.java

...pendes/indexer/middleware/AuthorizationRequestFilter.java

...endes/indexer/middleware/RedirectHttpRequestsHandler.java