HPCC-13512 Use latest available JDK when building system

Reordered paths in FindJNI module to find the latest JDK first, which ensures
that the latest JDK is used on systems like Ubuntu 14.04, where JDK6 and 7
are both installed.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>

cmake_modules/FindJNI.cmake

@@ -162,8 +162,8 @@ JAVA_APPEND_LIBRARY_DIRECTORIES(JAVA_AWT_LIBRARY_DIRECTORIES
   /usr/lib/jvm/java-6-sun/jre/lib/{libarch}
   /usr/lib/jvm/java-1.5.0-sun/jre/lib/{libarch}
   /usr/lib/jvm/java-6-sun-1.6.0.00/jre/lib/{libarch}       # can this one be removed according to #8821 ? Alex
-  /usr/lib/jvm/java-6-openjdk-{libarch}/jre/lib/{libarch}  # Ubuntu 12.10 location
   /usr/lib/jvm/java-7-openjdk-{libarch}/jre/lib/{libarch}  # Ubuntu 13.04 location
+  /usr/lib/jvm/java-6-openjdk-{libarch}/jre/lib/{libarch}  # Ubuntu 12.10 location
   /usr/lib/jvm/java-6-openjdk/jre/lib/{libarch}
   /usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0/jre/lib/{libarch}        # fedora
   # Debian specific paths for default JVM
@@ -193,8 +193,8 @@ JAVA_APPEND_LIBRARY_DIRECTORIES(JAVA_AWT_EXPANDED_INCLUDE_DIRECTORIES
   /usr/lib/jvm/java-6-sun/include
   /usr/lib/jvm/java-1.5.0-sun/include
   /usr/lib/jvm/java-6-sun-1.6.0.00/include       # can this one be removed according to #8821 ? Alex
-  /usr/lib/jvm/java-6-openjdk-{libarch}/jre/lib/{libarch}  # Ubuntu 12.10 location
   /usr/lib/jvm/java-7-openjdk-{libarch}/include  # Ubuntu 13.04 location
+  /usr/lib/jvm/java-6-openjdk-{libarch}/jre/lib/{libarch}  # Ubuntu 12.10 location
   /usr/lib/jvm/java-6-openjdk/include
   /usr/local/share/java/include
   /usr/lib/j2sdk1.4-sun/include
@@ -313,4 +313,4 @@ SET(JNI_INCLUDE_DIRS
   ${JAVA_INCLUDE_PATH}
   ${JAVA_INCLUDE_PATH2}
   ${JAVA_AWT_INCLUDE_PATH}
-)
+)