Add missing files and fix .gitignore

.gitignore

...-java/org/sdnplatform/sync/thrift/AsyncMessageHeader.java

lib/gen-java/org/sdnplatform/sync/thrift/ClockEntry.java

lib/gen-java/org/sdnplatform/sync/thrift/Constants.java

...ava/org/sdnplatform/sync/thrift/CursorRequestMessage.java

...va/org/sdnplatform/sync/thrift/CursorResponseMessage.java

...ava/org/sdnplatform/sync/thrift/DeleteRequestMessage.java

...va/org/sdnplatform/sync/thrift/DeleteResponseMessage.java

...en-java/org/sdnplatform/sync/thrift/EchoReplyMessage.java

...-java/org/sdnplatform/sync/thrift/EchoRequestMessage.java

lib/gen-java/org/sdnplatform/sync/thrift/ErrorMessage.java

...a/org/sdnplatform/sync/thrift/FullSyncRequestMessage.java

...n-java/org/sdnplatform/sync/thrift/GetRequestMessage.java

...-java/org/sdnplatform/sync/thrift/GetResponseMessage.java

lib/gen-java/org/sdnplatform/sync/thrift/HelloMessage.java

lib/gen-java/org/sdnplatform/sync/thrift/KeyedValues.java

lib/gen-java/org/sdnplatform/sync/thrift/KeyedVersions.java

lib/gen-java/org/sdnplatform/sync/thrift/MessageType.java

...n-java/org/sdnplatform/sync/thrift/PutRequestMessage.java

...-java/org/sdnplatform/sync/thrift/PutResponseMessage.java