Tested the new start code on windows.

Turns out that on windows, python scripts would fail to rename known_host file with the error `file occupied by other process.`
This problem could be addressed by 1) closing each driver properly and/or 2) tiggering GC after each write op to known_host file.
However we work around this problem in this PR by letting java driver code to delete the known_host file directly.

Author: Zhen Li

README.md

@@ -56,25 +56,13 @@ Java 8, because Neo4j-the-database needs it to run.
 
 ### Windows
 
-If you are building on windows, you need to have Python (v2.7) installed and run install as admin,
-so that Neo4j-the-database could be installed and started with Python scripts for integration tests.
-Or you could choose to ignore integration tests by running:
-
-    mvn clean install -DskipITs
-
-## Q&A
+If you are building on windows, you need to have Python (v2.7) installed and have Python.exe to be added in your system `PATH` variables.
+Then run install as admin, so that Neo4j-the-database could be installed and started with Python scripts for integration tests.
 
-**Q**: Where can I find the changelogs?  
-**A**: [wiki](https://github.com/neo4j/neo4j-java-driver/wiki)
-
-
-**Q**: Why my driver stops working today after I upgrade my Neo4j server? It was working well yesterday.  
-**A**: If the driver is configured to use [trust-on-first-use]
-(http://neo4j.com/docs/developer-manual/3.0/index.html#_trust) mode,
-then following the error message you got while using the driver, you might need to modify `known_hosts` file.
+Or you could choose to ignore integration tests by running:
 
+    mvn clean install -DskipITs 
 
-**Q**: Why I cannot connect the driver to the server at `bolt://localhost:7474`?  
-**A**: Bolt uses port 7687 by default, so try `bolt://localhost:7687` or `bolt://localhost` instead.
+Without integration tests, there is no need to install Python or run as admin.
 
-For any other questions, please refer to Github issues.
+For more information such as manual, driver API documentations, changelogs, please refer to [wiki](https://github.com/neo4j/neo4j-java-driver/wiki).

driver/src/test/java/org/neo4j/driver/v1/util/Neo4jRunner.java

@@ -33,6 +33,7 @@
 import org.neo4j.driver.v1.Driver;
 import org.neo4j.driver.v1.GraphDatabase;
 
+import static org.neo4j.driver.internal.ConfigTest.deleteDefaultKnownCertFileIfExists;
 import static org.neo4j.driver.v1.util.FileTools.updateProperties;
 
 /**
@@ -45,12 +46,13 @@ public class Neo4jRunner
 
     private static final boolean debug = Boolean.getBoolean( "neo4j.runner.debug" );
 
+    public static final String NEORUN_START_ARGS = System.getProperty("neorun.start.args", "-v 3.0.1");
     public static final String DEFAULT_URL = "bolt://localhost:7687";
     private static final Config TEST_CONFIG = Config.build().withEncryptionLevel( Config.EncryptionLevel.NONE ).toConfig();
     private Driver driver;
     private Neo4jSettings currentSettings = Neo4jSettings.DEFAULT_SETTINGS;
 
-    public static final String NEO4J_HOME = "../target/neo4j/neo4jhome";
+    public static final String NEO4J_HOME = new File("../target/neo4j/neo4jhome").getAbsolutePath();
     private static final String NEORUN_PATH = new File("../neokit/neorun.py").getAbsolutePath();
     private static final String NEO4J_CONF = new File( NEO4J_HOME, "conf/neo4j.conf" ).getAbsolutePath();
 
@@ -94,7 +96,10 @@ public Driver driver()
 
     private void startNeo4j() throws IOException
     {
-        startNeo4j( "-v", "3.0.1" );
+        // this is required for windows as python scripts cannot delete the file when it is used by driver tests
+        deleteDefaultKnownCertFileIfExists();
+
+        startNeo4j( NEORUN_START_ARGS.split( "\\s" ) );
     }
 
     private void startNeo4j(String... opts) throws IOException
@@ -105,7 +110,7 @@ private void startNeo4j(String... opts) throws IOException
         int processStatus = runCommand( cmds.toArray( new String[cmds.size()]) );
         if (processStatus != 0) // success
         {
-            throw new IOException( "Failed to the start neo4j server." );
+            throw new IOException( "Failed to start neo4j server." );
         }
         driver = GraphDatabase.driver( DEFAULT_URL, TEST_CONFIG );
     }
@@ -153,8 +158,7 @@ public void restartNeo4j(Neo4jSettings neo4jSettings) throws IOException
     {
         if( updateServerSettings( neo4jSettings ) ) // needs to update server setting files
         {
-            stopNeo4j();
-            startNeo4j();
+            forceToRestart();
         }
     }