Display the actual memory values in N+1 failures
Display the actual memory values in N+1 failures

This changes the display from:
Mon Apr  4 02:29:46 2011 * Verifying N+1 Memory redundancy
Mon Apr  4 02:29:46 2011   - ERROR: node node2: not enough memory to
accomodate instance failovers should node node1 fail

To:

Mon Apr  4 02:32:50 2011 * Verifying N+1 Memory redundancy
Mon Apr  4 02:32:50 2011   - ERROR: node node2: not enough memory to
accomodate instance failovers should node node1 fail (33536MiB needed,
27910MiB available)

Signed-off-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>
Reviewed-by: Michael Hanselmann <68b67885ff74281219b4a4be33cc20fd45078d7c@google.com>

leshchevds/ganeti,dimara/ganeti,mbakke/ganeti,apyrgio/ganeti,yiannist/ganeti,grnet/snf-ganeti,dimara/ganeti,ganeti/ganeti,apyrgio/ganeti,ganeti/ganeti,mbakke/ganeti,andir/ganeti,apyrgio/snf-ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,onponomarev/ganeti,onponomarev/ganeti,leshchevds/ganeti,mbakke/ganeti,bitemyapp/ganeti,andir/ganeti,andir/ganeti,yiannist/ganeti,apyrgio/snf-ganeti,ganeti-github-testing/ganeti-test-1,bitemyapp/ganeti,ganeti/ganeti,grnet/snf-ganeti,yiannist/ganeti