[NO ISSUE][TEST] Fix spidersilk dockerfile

Change-Id: I456cf3b5694dbe2cbf9e2918f67d71a5636f38cc
Reviewed-on: https://asterix-gerrit.ics.uci.edu/3310
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Michael Blow <mblow@apache.org>
diff --git a/asterixdb/asterix-spidersilk/docker/Dockerfile b/asterixdb/asterix-spidersilk/docker/Dockerfile
index 3f7f6bb..b25561a 100644
--- a/asterixdb/asterix-spidersilk/docker/Dockerfile
+++ b/asterixdb/asterix-spidersilk/docker/Dockerfile
@@ -15,6 +15,8 @@
 # specific language governing permissions and limitations
 # under the License.
 
-FROM java:8-jre
+FROM centos:7
 
-RUN apt update && apt install -y iptables
\ No newline at end of file
+USER root
+
+RUN yum install -y unzip git which docker-client java-1.8.0-openjdk-headless