qa/1457: don't run on Ubuntu 19.10
qa/1457: don't run on Ubuntu 19.10

There is some fatal issue here with libuv, libssl, libcrypto and valgind
that produces 400+ different faults as reported by valgrind.  For future
reference (in case this is really a pmproxy bug, which seems unlikely)
here is the first of the reported errors:

  Conditional jump or move depends on uninitialised value(s)
  at 0x4C4C30B: ??? (in /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1)
  by 0x4C4D24B: RAND_DRBG_generate (in /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1)
  by 0x4C4E764: ??? (in /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1)
  by 0x4C4CA4D: RAND_DRBG_instantiate (in /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1)
  by 0x4C4D9BA: ??? (in /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1)
  by 0x4C4DD91: RAND_DRBG_get0_public (in /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1)
  by 0x4C4DDC3: ??? (in /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1)
  by 0x4A50537: SSL_CTX_new (in /usr/lib/x86_64-linux-gnu/libssl.so.1.1)
  by 0x11C8FF: ??? (in /usr/lib/pcp/bin/pmproxy)
  by 0x11225F: ??? (in /usr/lib/pcp/bin/pmproxy)
  by 0x4D8AF65: uv__run_timers (in /usr/lib/x86_64-linux-gnu/libuv.so.1.0.0)
  by 0x4D8E3E9: uv_run (in /usr/lib/x86_64-linux-gnu/libuv.so.1.0.0)

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp