Estimation too conservative by default

[MikeG]

Current defaults in 1.0.10:

# holland mc mysqldump 2>&1 | grep estimated-size-factor
estimated-size-factor = 1.0
# holland mc xtrabackup 2>&1 | grep estimated-size-factor
estimated-size-factor = 1.0
# holland mc mysql-lvm 2>&1 | grep estimated-size-factor
estimated-size-factor = 1.0

These should probably be lowered to at least 0.5 by default in the Holland 1.0.x series.