CRUD api for long running operation notification config (#722)

* notification crud api

Signed-off-by: zhichao-aws <[email protected]>

* changes based on comments; add tests

Signed-off-by: zhichao-aws <[email protected]>

* changes for comment

Signed-off-by: zhichao-aws <[email protected]>

* change behavior for get action index not exists, fix test cases

Signed-off-by: zhichao-aws <[email protected]>

* fix weak password for changes in security plugin

Signed-off-by: zhichao-aws <[email protected]>

---------

Signed-off-by: zhichao-aws <[email protected]>

Author: zhichao-aws

src/main/kotlin/org/opensearch/indexmanagement/IndexManagementPlugin.kt

@@ -25,9 +25,9 @@ import org.opensearch.common.settings.Setting
 import org.opensearch.common.settings.Settings
 import org.opensearch.common.settings.SettingsFilter
 import org.opensearch.common.util.concurrent.ThreadContext
+import org.opensearch.common.xcontent.XContentParserUtils.ensureExpectedToken
 import org.opensearch.core.xcontent.NamedXContentRegistry
 import org.opensearch.core.xcontent.XContentParser.Token
-import org.opensearch.common.xcontent.XContentParserUtils.ensureExpectedToken
 import org.opensearch.env.Environment
 import org.opensearch.env.NodeEnvironment
 import org.opensearch.indexmanagement.controlcenter.notification.ControlCenterIndices
@@ -125,6 +125,7 @@ import org.opensearch.indexmanagement.rollup.settings.RollupSettings
 import org.opensearch.indexmanagement.rollup.util.QueryShardContextFactory
 import org.opensearch.indexmanagement.rollup.util.RollupFieldValueExpressionResolver
 import org.opensearch.indexmanagement.settings.IndexManagementSettings
+import org.opensearch.indexmanagement.snapshotmanagement.SMRunner
 import org.opensearch.indexmanagement.snapshotmanagement.api.resthandler.RestCreateSMPolicyHandler
 import org.opensearch.indexmanagement.snapshotmanagement.api.resthandler.RestDeleteSMPolicyHandler
 import org.opensearch.indexmanagement.snapshotmanagement.api.resthandler.RestExplainSMPolicyHandler
@@ -140,7 +141,6 @@ import org.opensearch.indexmanagement.snapshotmanagement.api.transport.get.Trans
 import org.opensearch.indexmanagement.snapshotmanagement.api.transport.index.TransportIndexSMPolicyAction
 import org.opensearch.indexmanagement.snapshotmanagement.api.transport.start.TransportStartSMAction
 import org.opensearch.indexmanagement.snapshotmanagement.api.transport.stop.TransportStopSMAction
-import org.opensearch.indexmanagement.snapshotmanagement.SMRunner
 import org.opensearch.indexmanagement.snapshotmanagement.model.SMMetadata
 import org.opensearch.indexmanagement.snapshotmanagement.model.SMPolicy
 import org.opensearch.indexmanagement.snapshotmanagement.settings.SnapshotManagementSettings