message: remove connectionCb and messageCb parameters from agentAddIdentity() and agentRemoveIdentity()
diff: @@ -108,9 +108,7 @@ public class Agent extends IndyJava.API {
  Agent.Listener listener,
  Pool pool,
  Wallet wallet,
  - String did,
  - Callback connectionCb,
  - Callback messageCb) throws IndyException {
  + String did) throws IndyException {
  final CompletableFuture<AgentAddIdentityResult> future = new CompletableFuture<> ();
  @@ -146,9 +144,7 @@ public class Agent extends IndyJava.API {
  public static Future<AgentRemoveIdentityResult> agentRemoveIdentity(
  Agent.Listener listener,
  Wallet wallet,
  - String did,
  - Callback connectionCb,
  - Callback messageCb) throws IndyException {
  + String did) throws IndyException {
  final CompletableFuture<AgentRemoveIdentityResult> future = new CompletableFuture<> ();
  @@ -311,14 +307,14 @@ public class Agent extends IndyJava.API {
  return this.listenerHandle;
  }
  - public Future<AgentAddIdentityResult> agentAddIdentity(Pool pool, Wallet wallet, String did, Callback connectionCb, Callback messageCb) throws IndyException {
  + public Future<AgentAddIdentityResult> agentAddIdentity(Pool pool, Wallet wallet, String did) throws IndyException {
  - return Agent.agentAddIdentity(this, pool, wallet, did, connectionCb, messageCb);
  + return Agent.agentAddIdentity(this, pool, wallet, did);
  }
  - public Future<AgentRemoveIdentityResult> agentRemoveIdentity(Wallet wallet, String did, Callback connectionCb, Callback messageCb) throws IndyException {
  + public Future<AgentRemoveIdentityResult> agentRemoveIdentity(Wallet wallet, String did) throws IndyException {
  - return Agent.agentRemoveIdentity(this, wallet, did, connectionCb, messageCb);
  + return Agent.agentRemoveIdentity(this, wallet, did);
  }
  public Future<AgentCloseListenerResult> agentCloseListener() throws IndyException {
  