Revert "japi: Move Java API binding to cmake"

components:  Development
CMake Error at /usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
  Could NOT find JNI (missing: JAVA_AWT_INCLUDE_PATH)
Call Stack (most recent call first):
/usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-3.10/Modules/FindJNI.cmake:310 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  CMakeLists.txt:37 (find_package)
-- Configuring incomplete, errors occurred!
See also "/scratch/vpp-tmp/build-root/build-vpp-native/japi/CMakeFiles/CMakeOutput.log".
See also "/scratch/vpp-tmp/build-root/build-vpp-native/japi/CMakeFiles/CMakeError.log".
Makefile:640: recipe for target 'japi-configure' failed
make[2]: *** [japi-configure] Error 1
make[2]: Leaving directory '/scratch/vpp-tmp/build-root'

This reverts commit a33db2528485ac39e8987bec7b138dbdad21dc5a.

Change-Id: I8a818ce70a8379656c1134432e22db418a4690fe
Signed-off-by: Damjan Marion <damarion@cisco.com>