[CSV-175] Add PIPE char for Informix WIP.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1739678 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/main/java/org/apache/commons/csv/Constants.java

@@ -66,7 +66,7 @@ final class Constants {
      */
     static final String PARAGRAPH_SEPARATOR = "\u2029";
 
-    static final String PIPE = "|";
+    static final char PIPE = '|';
 
     /** ASCII record separator */
     static final char RS = 30;