automate lighty.io build process

automate lighty.io build process

in the lighty folder
- create a patch file to remove deviations from ordm 4.1 network models:
    org-openroadm-otn-network-topology@2018-11-30.yang
    org-openroadm-network-topology@2018-11-30.yang
    org-openroadm-network@2018-11-30.yang
- script the lighty.io build process described in the README file
    - patch ordm 4.1 network models mentionned above
    - build transportPCE with karaf
    - download and build lighty-core 10.x.x
    - build transportPCE with lighty.io
    - comment out patch and lighty-core folder clean-up
- mention the script in the README file

JIRA: TRNSPRTPCE-126
Change-Id: I6bfedb2f9424304d4f86f8ede8bc49521c3cb185
Signed-off-by: guillaume.lambert <guillaume.lambert@orange.com>