Setting tag sfa-2.1-26

Setting tag sfa-2.1-26
-- core
do start flash policy server when configured
fix PLCInvalidArgument
fix sfaadmin.py list
fix version number of GENIv3 RSpec in sfi.py
Add support of leases in PGv2 and GENIv3 RSpecs
pldriver.delete_sliver removes leases as well
-- senslab
handling user creation in the senslab LDAP when a user from a federated testbed creates a lease using senslab resources
changed lease granularity to 1 minute.
add check to ensure the required expirement is of 10 min duration minimum
fix sliver_status
fix leases management
fixed GetSlices, delete_sliver and DeleteJobs
cleanup and code documention - removed unused functions and methods
changed some return values to be easier to handle for the most part
refactored slabimport module
added a Jenkins configuration file to test automated deployment, which is not working yet