tarantool / tarantool / 9082

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travis-ci

Extract space_def, space_opts, func_def, opt_def from key_def.h

Key_def.h contains very big number of various defs including
key_def: space_def, func_def, priv_def, opt_def, index_def.
Also key_def.h defines such structures as access, credentials.

Defs, listed above, are not linked with keys and key_defs, except
index_def.

Lets extract them into separate files, because further space_def
will contain list of column_defs, and key_def.h/.cc become too big.

Needed for #2652

50 of 50 new or added lines in 7 files covered. (100.0%)

54887 of 72075 relevant lines covered (76.15%)

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