test on travis also on Solr v6 and v7

Author: sckott

.travis.yml

@@ -14,6 +14,8 @@ r_github_packages:
 env:
   matrix:
   - SOLR_VERSION=5.4.1
+  - SOLR_VERSION=6.0.0
+  - SOLR_VERSION=7.0.0
 
 before_install:
   - case "$SOLR_VERSION" in
@@ -23,6 +25,16 @@ before_install:
       export SOLR_VERSION=5.4.1 ;
       mkdir temp && cd temp && wget http://archive.apache.org/dist/lucene/solr/$SOLR_VERSION/solr-$SOLR_VERSION.tgz && tar -zxf solr-$SOLR_VERSION.tgz && cd solr-$SOLR_VERSION && bin/solr start -p 8983 && bin/solr create -c gettingstarted -p 8983 && bin/post -c gettingstarted example/exampledocs/*.xml && cd ../../
       ;;
+
+    "6.0.0")
+      export SOLR_VERSION=6.0.0 ;
+      mkdir temp && cd temp && wget http://archive.apache.org/dist/lucene/solr/$SOLR_VERSION/solr-$SOLR_VERSION.tgz && tar -zxf solr-$SOLR_VERSION.tgz && cd solr-$SOLR_VERSION && bin/solr start -p 8983 && bin/solr create -c gettingstarted -p 8983 && bin/post -c gettingstarted example/exampledocs/*.xml && cd ../../
+      ;;
+
+    "7.0.0")
+      export SOLR_VERSION=7.0.0 ;
+      mkdir temp && cd temp && wget http://archive.apache.org/dist/lucene/solr/$SOLR_VERSION/solr-$SOLR_VERSION.tgz && tar -zxf solr-$SOLR_VERSION.tgz && cd solr-$SOLR_VERSION && bin/solr start -p 8983 && bin/solr create -c gettingstarted -p 8983 && bin/post -c gettingstarted example/exampledocs/*.xml && cd ../../
+      ;;
    esac