Adjust make repo

Adjust make repo

Demand:
  1.Compass4nfv master code only support one OPNFV version
    now, no need to keep previous version's repo scripts
  2.Currently java packages are in /var/www/package/onos
    directory which is unreasonable
  3.repo.conf has a lot of download URL which can turn into
    pip requirements

Modification:
  1.Remove previous version's directory in compass4nfv/repo
  2.Only leave java and odl in compass4nfv/repo/features.
    Other features can be added when they are ready
  3.Seperate URLs in repo.conf into compass-core and openstack
    pip requirements. Therefore pip.tar.gz only contains pip
    packages for compass-core and pip-openstack.tar.gz only
    contains pip packages for openstack
  3.Move java packages into /var/www/package/java directory
  4.Add make pip wheel package function to support congress
  5.Use ODL package distribution-karaf-0.5.0-Boron.tar.gz
  6.Use python package netwoking-odl-3.2.0

Change-Id: Ifa818e7630ac4435e3bdb7756b83f80f50c24a76
Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>