FAB-4501-Bad null check channelConfiguration

Change-Id: Ie61bfa9c106a4767449c849ad901beea2276574d
Signed-off-by: rickr <cr22rc@gmail.com>

src/main/java/org/hyperledger/fabric/sdk/Channel.java

@@ -152,9 +152,6 @@ public Collection<EventHub> getEventHubs() {
     private Block genesisBlock;
     private final boolean systemChannel;
 
-    ExecutorService getChannelExecutorService() {
-        return executorService;
-    }
 
     private Channel(String name, HFClient hfClient, Orderer orderer, ChannelConfiguration channelConfiguration, byte[][] signers) throws InvalidArgumentException, TransactionException {
         this(name, hfClient, false);
@@ -686,7 +683,6 @@ private Block getGenesisBlock(Orderer order) throws TransactionException {
 
                     byte[] deliverPayloadBytes = deliverPayload.toByteArray();
 
-
                     Envelope deliverEnvelope = Envelope.newBuilder()
                             .setSignature(ByteString.copyFrom(cryptoSuite.sign(getEnrollment().getKey(), deliverPayloadBytes)))
                             .setPayload(ByteString.copyFrom(deliverPayloadBytes))
@@ -2152,7 +2148,7 @@ private Pair(Peer peer, Future<FabricProposalResponse.ProposalResponse> future)
      * Send transaction to one of the orderers on the channel using a specific user context.
      *
      * @param proposalResponses The proposal responses to be sent to the orderer.
-     * @param userContext The usercontext used for signing transaction.
+     * @param userContext       The usercontext used for signing transaction.
      * @return a future allowing access to the result of the transaction invocation once complete.
      */
     public CompletableFuture<TransactionEvent> sendTransaction(Collection<ProposalResponse> proposalResponses, User userContext) {
@@ -2318,7 +2314,7 @@ byte[] getChannelConfigurationSignature(ChannelConfiguration channelConfiguratio
 
         }
 
-        if (signer == channelConfiguration) {
+        if (null == channelConfiguration) {
 
             throw new InvalidArgumentException("channelConfiguration is null");