consistent initialization for the StringBuilder in DefaultDbSqlContext

src/main/java/com/avaje/ebeaninternal/server/query/DefaultDbSqlContext.java

@@ -14,6 +14,7 @@ public class DefaultDbSqlContext implements DbSqlContext {
   private static final String COMMA = ", ";
 
   private static final String PERIOD = ".";
+  private static final int STRING_BUILDER_INITIAL_CAPACITY = 140;
 
   private final String tableAliasPlaceHolder;
 
@@ -29,7 +30,7 @@ public class DefaultDbSqlContext implements DbSqlContext {
 
   private int columnIndex;
 
-  private StringBuilder sb = new StringBuilder(140);
+  private StringBuilder sb = new StringBuilder(STRING_BUILDER_INITIAL_CAPACITY);
 
   /**
    * A Set used to make sure formula joins are only added once to a query.
@@ -253,7 +254,7 @@ public class DefaultDbSqlContext implements DbSqlContext {
 
   public String getContent() {
     String s = sb.toString();
-    sb = new StringBuilder();
+    sb = new StringBuilder(STRING_BUILDER_INITIAL_CAPACITY);
     return s;
   }