Tor Travis: Make chutney work on Xenial and Bionic images
We get weird permissions errors like this:
FAIL: basic-min
Detail: chutney/tools/warnings.sh /home/travis/build/teor2345/tor/chutney/net/nodes.1571845015
Warning: Can't create/check datadirectory /home/travis/build/teor2345/tor/chutney/net/nodes/002r Number: 1
Warning: Could not open "/home/travis/build/teor2345/tor/chutney/net/nodes/000a/key-pinning-journal" for mmap(): Permission denied Number: 1
Warning: Could not open "/home/travis/build/teor2345/tor/chutney/net/nodes/001a/key-pinning-journal" for mmap(): Permission denied Number: 1
Warning: Could not open "/home/travis/build/teor2345/tor/chutney/net/nodes/003c/cached-certs": Permission denied Number: 1
Warning: Could not open "/home/travis/build/teor2345/tor/chutney/net/nodes/003c/cached-consensus" for mmap(): Permission denied Number: 1
Warning: Could not open "/home/travis/build/teor2345/tor/chutney/net/nodes/003c/cached-descriptors" for mmap(): Permission denied Number: 1
Warning: Could not open "/home/travis/build/teor2345/tor/chutney/net/nodes/003c/cached-extrainfo" for mmap(): Permission denied Number: 1
Warning: Could not open "/home/travis/build/teor2345/tor/chutney/net/nodes/003c/cached-microdesc-consensus" for mmap(): Permission denied Number: 1
Warning: Could not open "/home/travis/build/teor2345/tor/chutney/net/nodes/003c/cached-microdescs" for mmap(): Permission denied Number: 1
Warning: Could not open "/home/travis/build/teor2345/tor/chutney/net/nodes/003c/cached-microdescs.new": Permission denied Number: 1
Warning: Could not open "/home/travis/build/teor2345/tor/chutney/net/nodes/003c/unverified-consensus" for mmap(): Permission denied Number: 1
Warning: Could not open "/home/travis/build/teor2345/tor/chutney/net/nodes/003c/unverified-microdesc-consensus" for mmap(): Permission denied Number: 1
Warning: Directory /home/travis/build/teor2345/tor/chutney/net/nodes/002r cannot be read: Permission denied Number: 1
Warning: Error initializing keys; exiting Number: 1
Warning: Error loading key-pinning journal: Permission denied Number: 2