Add netcat to Zookeeper image

library/zookeeper

@@ -3,10 +3,10 @@ GitRepo: https://github.com/31z4/zookeeper-docker.git
 
 Tags: 3.4.14, 3.4
 Architectures: amd64
-GitCommit: 01d134a4dcb1676d7efe9d0c64c5e0cfdba6fb27
+GitCommit: 0ac81c1137d4714fa2d5f698b99b29aabf1fa383
 Directory: 3.4.14
 
 Tags: 3.5.5, 3.5, latest
 Architectures: amd64
-GitCommit: 01d134a4dcb1676d7efe9d0c64c5e0cfdba6fb27
+GitCommit: 0ac81c1137d4714fa2d5f698b99b29aabf1fa383
 Directory: 3.5.5