Rename raft log pruning setting to be consistent with kernel.

The raft log pruning naming was the inverse of how it was named in
the kernel settings. This lead to logs to always be pruned rather than
never being pruned.

community/kernel/src/test/java/org/neo4j/kernel/impl/transaction/log/pruning/ThresholdConfigParserTest.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2002-2016 "Neo Technology,"
+ * Network Engine for Objects in Lund AB [http://neotechnology.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Neo4j is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.neo4j.kernel.impl.transaction.log.pruning;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+import static org.neo4j.kernel.impl.transaction.log.pruning.ThresholdConfigParser.ThresholdConfigValue;
+import static org.neo4j.kernel.impl.transaction.log.pruning.ThresholdConfigParser.ThresholdConfigValue.NO_PRUNING;
+import static org.neo4j.kernel.impl.transaction.log.pruning.ThresholdConfigParser.parse;
+
+public class ThresholdConfigParserTest
+{
+    @Test
+    public void parseTrue() throws Exception
+    {
+        ThresholdConfigValue aTrue = parse( "true" );
+        assertEquals( NO_PRUNING.type, aTrue.type );
+        assertEquals( NO_PRUNING.value, aTrue.value );
+    }
+
+    @Test
+    public void parseFalse() throws Exception
+    {
+        ThresholdConfigValue aFalse = parse( "false" );
+        assertEquals( "entries", aFalse.type );
+        assertEquals( 1, aFalse.value );
+    }
+
+    @Test(expected=IllegalArgumentException.class)
+    public void parseGarbage() throws Exception
+    {
+        parse( "davide" );
+        fail("Expected IllegalArgumentException");
+    }
+}

enterprise/core-edge/src/main/java/org/neo4j/coreedge/server/CoreEdgeClusterSettings.java

@@ -173,7 +173,7 @@ public String toString()
 
     @Description( "RAFT log pruning strategy" )
     public static final Setting<String> raft_log_pruning =
-            setting( "core_edge.raft_log_pruning", STRING, "false" );
+            setting( "core_edge.keep_raft_logs", STRING, "true" );
 
     @Description( "RAFT log implementation" )
     public static final Setting<String> raft_log_implementation =

enterprise/core-edge/src/test/java/org/neo4j/coreedge/raft/log/segmented/NoPruningPruningStrategyTest.java

@@ -26,7 +26,7 @@
 public class NoPruningPruningStrategyTest
 {
     @Test
-    public void shouldNotExludeAnySegmentPages() throws Exception
+    public void shouldNotExcludeAnySegmentPages() throws Exception
     {
          NoPruningPruningStrategy strategy = new NoPruningPruningStrategy();