Accross the code, release names are checked against some variation of
-BETAx / -RCx which are inconsistent in the range of accepted values for
`x`.
As a consequence, some commands cannot be successfuly run while they
are valid, e.g. `bastille create test 14.0-RC4 10.0.0.2` is rejected
because only `*-RC1` and `*-RC2` are accepted as a RC release name.
Find out these lists of specific BETA and RC patterns and adjust them to
allow any one-digit value at the end. We generaly do up to 4 BETA / RC
releases, so a one digit limit is probably enough for the time being.
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