csd: stop threatening the stability of our build
csd: stop threatening the stability of our build

We shouldn't list the same plugin twice; better to list the two executions
once in the single plugin section.

[WARNING] Some problems were encountered while building the effective model for com.cloudera.csd:KUDU:pom:0.1.0
[WARNING] 'build.plugins.plugin.(groupId:artifactId)' must be unique but found duplicate declaration of plugin org.codehaus.mojo:exec-maven-plugin @ line 43, column 15
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.

Change-Id: I866b993e6bfbf7c22100d0226d5b856c3b878dfb
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/6754
Reviewed-by: Todd Lipcon <2c763d726a8c2f6afda9be7e0e56a2caa6bb5e6b@cloudera.com>
Tested-by: jenkins

EvilMcJerkface/kudu,EvilMcJerkface/kudu,helifu/kudu,EvilMcJerkface/kudu,EvilMcJerkface/kudu,EvilMcJerkface/kudu,cloudera/kudu,InspurUSA/kudu,andrwng/kudu,InspurUSA/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,cloudera/kudu,helifu/kudu,helifu/kudu,helifu/kudu,InspurUSA/kudu,cloudera/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,andrwng/kudu,InspurUSA/kudu,InspurUSA/kudu,andrwng/kudu,InspurUSA/kudu,helifu/kudu,andrwng/kudu,andrwng/kudu,cloudera/kudu,helifu/kudu,EvilMcJerkface/kudu,cloudera/kudu,andrwng/kudu,cloudera/kudu,andrwng/kudu,cloudera/kudu,InspurUSA/kudu,andrwng/kudu,cloudera/kudu,helifu/kudu,helifu/kudu,cloudera/kudu,andrwng/kudu,helifu/kudu,EvilMcJerkface/kudu