Accept multiple pending logsources in Batch.
* Will return accepted log sources details based on system generated log source Ids.

* MsgSourceType and MsgSourceAcceptanceId are the only required fields for each pending log source settings node in request body.

* If log source name will not be provided in request payload, system generated name will be assigned to new logsource.

* If knownHost will not be provided in request payload, admin-api will resolve logsource's host automatically.
Also if incorrect knownHost is provided,then it will be ignored and admin-api will resolve logsource's host automatically.

* If mpePolicy will not be provided in request payload, default mpePolicy will be assigned to logsource based on msgSourceType.

* Either acceptDefault or enableCustomizeAcceptance need to be set to true in order to accept pending LogSource.

* In case of custom acceptance, host assignment/creation will be done based on the entity id given in request payload.

* If entity id will not be provided with custom acceptance, logsource will be created on the pending LogSource's agent entity.

* In custom acceptance, api wil give priority to entity given in request body for host assignment instead of KnownHost.