keeper: improve wal_level selection #450
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* Read the user provided pgParameters and if the provided wal_level is "logical" use it, other values (invalid or unsupported) will return the default stolon wal_level. * Also if hot_standby is valid for every supported version let's prefer "replica" when using postgres >= 9.6
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keeper: improve wal_level selection
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Read the user provided pgParameters and if the provided wal_level is "logical"
use it, other values (invalid or unsupported) will return the default stolon wal_level.
Also if hot_standby is valid for every supported version let's prefer
"replica" when using postgres >= 9.6