oval_lib.py: increase the base ID number multiplier
Test IDs for a given CVE are generated from the base ID, which is
derived from the CVE, and then incremented fo each test condition.
However, some source packages generate hundreds of binary packages, and
some CVEs affect multiples of these source packages, resulting in
duplicate test IDs.
To work around this, we bump up the multiplier to 1000000; if we
ever have a CVE end up affecting source packages that result in more
than one million binary packages in a given release, we could again
get overlap, but that is an unlikely occurrence, given our releases
contain less than 100,000 binary packages.
Signed-off-by: Steve Beattie <email address hidden>