Add conflicts for default and oss packages

This commit adds conflicts between the default and oss packages so that
a user can not install both via a package manager (as they share paths).

distribution/packages/build.gradle

@@ -199,6 +199,9 @@ Closure commonPackageConfig(String type, boolean oss) {
     copyEmptyDir('/var/log/elasticsearch', 'elasticsearch', 'elasticsearch', 0750)
     copyEmptyDir('/var/lib/elasticsearch', 'elasticsearch', 'elasticsearch', 0750)
     copyEmptyDir('/usr/share/elasticsearch/plugins', 'root', 'root', 0755)
+
+    // the oss package conflicts with the default distribution and vice versa
+    conflicts('elasticsearch' + (oss ? '' : '-oss'))
   }
 }
 

qa/vagrant/src/test/resources/packaging/tests/30_deb_package.bats

@@ -49,6 +49,11 @@ setup() {
     dpkg -I elasticsearch-oss-$(cat version).deb | grep "Depends:.*bash.*"
 }
 
+@test "[DEB] package conflicts" {
+    dpkg -I elasticsearch-oss-$(cat version).deb | grep "^ Conflicts: elasticsearch$"
+    dpkg -I elasticsearch-$(cat version).deb | grep "^ Conflicts: elasticsearch-oss$"
+}
+
 ##################################
 # Install DEB package
 ##################################

qa/vagrant/src/test/resources/packaging/tests/40_rpm_package.bats

@@ -48,6 +48,11 @@ setup() {
     rpm -qpR elasticsearch-oss-$(cat version).rpm | grep '/bin/bash'
 }
 
+@test "[RPM] package conflicts" {
+    rpm -qp --conflicts elasticsearch-oss-$(cat version).rpm | grep "^elasticsearch\s*$"
+    rpm -qp --conflicts elasticsearch-$(cat version).rpm | grep "^elasticsearch-oss\s*$"
+}
+
 ##################################
 # Install RPM package
 ##################################