add kafka 1.0.0 to travis and as kafka version constant

.travis.yml

@@ -15,6 +15,7 @@ env:
   - KAFKA_VERSION=0.9.0.1
   - KAFKA_VERSION=0.10.2.1
   - KAFKA_VERSION=0.11.0.1
+  - KAFKA_VERSION=1.0.0
 
 before_install:
 - export REPOSITORY_ROOT=${TRAVIS_BUILD_DIR}

utils.go

@@ -147,5 +147,6 @@ var (
 	V0_10_1_0  = newKafkaVersion(0, 10, 1, 0)
 	V0_10_2_0  = newKafkaVersion(0, 10, 2, 0)
 	V0_11_0_0  = newKafkaVersion(0, 11, 0, 0)
+	V1_0_0_0   = newKafkaVersion(1, 0, 0, 0)
 	minVersion = V0_8_2_0
 )