only the metadata tables shall be able to use the tail cache

source/net/yacy/kelondro/table/Table.java

@@ -89,7 +89,6 @@ public class Table implements Index, Iterable<Row.Entry> {
     		boolean useTailCache,
     		final boolean exceed134217727,
     		final boolean warmUp) throws RowSpaceExceededException {
-        useTailCache = true; // fixed for testing
 
         this.rowdef = rowdef;
         this.buffersize = buffersize;

source/net/yacy/search/Switchboard.java

@@ -380,7 +380,7 @@ public final class Switchboard extends serverSwitch
                 mySeedFile,
                 redundancy,
                 partitionExponent,
-                this.useTailCache,
+                false,
                 this.exceed134217727);
 
         // initialize index