Revert "Fix the Text class package change in example plugins (elastic#128316)"

This reverts commit cc48648.

Author: prdoyle

plugins/examples/custom-suggester/src/main/java/org/elasticsearch/example/customsuggester/CustomSuggester.java

@@ -11,7 +11,7 @@
 
 import org.apache.lucene.search.IndexSearcher;
 import org.apache.lucene.util.CharsRefBuilder;
-import org.elasticsearch.xcontent.Text;
+import org.elasticsearch.common.text.Text;
 import org.elasticsearch.search.suggest.Suggest;
 import org.elasticsearch.search.suggest.Suggester;
 

plugins/examples/custom-suggester/src/main/java/org/elasticsearch/example/customsuggester/CustomSuggestion.java

@@ -11,7 +11,7 @@
 
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
-import org.elasticsearch.xcontent.Text;
+import org.elasticsearch.common.text.Text;
 import org.elasticsearch.search.suggest.Suggest;
 import org.elasticsearch.xcontent.ParseField;
 import org.elasticsearch.xcontent.XContentBuilder;