When a `CephBlockPool` defines `spec.erasureCoded.algorithm`, use it as
the erasure-code-profile plugin.
Until now, that parameter would have been ignored completely, and every
erasure-coded pool would use the same plugin as the `default`
erasure-code-profile (i.e. `jerasure`).
Note that using any algorithm other than `jerasure` or `isa` is likely
to fail given the current implementation, as different algorithm require
different sets of parameters, and those cannot be supplied by the
user.
Signed-off-by: Benoît Knecht <bknecht@protonmail.ch>
(cherry picked from commit d7f08693ed)