Version upgrade from 6 to 7

[kolate_sambhaji]

@masud
Go to bench-repo folder
git pull
Go back to frappe-bench folder
Run bench update

[Important] Error in Bench Update?

Hi everyone, Due to a recent change in how versioning is handled for frappe apps, bench update will break. If you get an error like: File "/home/travis/bench-repo/bench/app.py", line 132, in get_current_frappe_version return get_major_version(get_current_version('frappe', bench=bench)) File "/home/travis/bench-repo/bench/app.py", line 152, in get_current_version return get_version_from_string(f.read()) File "/home/travis/bench-repo/bench/app.py", line 240, in get_version_from_str…