[SPARK-1876] Windows fixes to deal with latest distribution layout changes

- Look for JARs in the right place
- Launch examples the same way as on Unix
- Load datanucleus JARs if they exist
- Don't attempt to parse local paths as URIs in SparkSubmit, since paths with C:\ are not valid URIs
- Also fixed POM exclusion rules for datanucleus (it wasn't properly excluding it, whereas SBT was)

Author: Matei Zaharia <matei@databricks.com>

Closes #819 from mateiz/win-fixes and squashes the following commits:

d558f96 [Matei Zaharia] Fix comment
228577b [Matei Zaharia] Review comments
d3b71c7 [Matei Zaharia] Properly exclude datanucleus files in Maven assembly
144af84 [Matei Zaharia] Update Windows scripts to match latest binary package layout

1 files changed, 1 insertions, 1 deletions

diff --git a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
index a99b2176e2..c54331c00f 100644
--- a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
@@ -299,7 +299,7 @@ object SparkSubmit {
   }
 
   private def addJarToClasspath(localJar: String, loader: ExecutorURLClassLoader) {
-    val localJarFile = new File(new URI(localJar).getPath)
+    val localJarFile = new File(localJar)
     if (!localJarFile.exists()) {
       printWarning(s"Jar $localJar does not exist, skipping.")
     }