Gmoshkin/minor fixes

Summary

• refactor: mod vshard

• debug: log more info

• test: add tests to check instance & replicaset structs match their space formats

• refactor: cleanup replicaset weight stuff

• fix: reduce number of idle governor loop iterations

• test: don't use explicit system space ids

Close #...

Ensure that

• New code is covered by tests
• API is documented
• Changelog is up to date
• (if Lua API changed) Lua API version is bumped in luamod.rs
• (if necessary) A follow-up doc issue is created in picodata/docs and linked here

added 4 commits

• e7f3ddfa - refactor: cleanup replicaset weight stuff
• 03576a59 - test: add tests to check instance & replicaset structs match their space formats
• c33e3803 - debug: log more info
• b6eb1bf4 - refactor: mod vshard

Compare with previous version

assigned to @rosik

added 4 commits

• e43fbb01 - refactor: remove the awful InstanceFieldDef stuff
• babfc01a - refactor: unify global table format definitions & check them in tests
• e940ac46 - debug: log more info
• 1de5f7b2 - refactor: mod vshard

Compare with previous version

added 4 commits

• 7026321f - test: check vshard is reconfigured upon incarnation change
• 445fe7b5 - test: move sharding related tests to test_sharding.py
• 97977323 - fix: pico.cas docs used to show incorrect update command
• 0b006fce - test: add test for user specified replicaset weights

Compare with previous version

added 10 commits

• c60ddaf2 - refactor: cleanup replicaset weight stuff
• 5b4db296 - test: add tests to check instance & replicaset structs match their space formats
• f07e12b0 - refactor: remove the awful InstanceFieldDef stuff
• 24f14a3a - refactor: unify global table format definitions & check them in tests
• ca2d76b4 - debug: log more info
• e5c73a10 - refactor: mod vshard
• 0848cd09 - test: check vshard is reconfigured upon incarnation change
• a0089447 - test: move sharding related tests to test_sharding.py
• e208b8bc - fix: pico.cas docs used to show incorrect update command
• 67167733 - test: add test for user specified replicaset weights

Compare with previous version

requested review from @rosik

approved this merge request

assigned to @gmoshkin and unassigned @rosik

removed review request for @rosik

added 6 commits

• 6032c8a5 - refactor: unify global table format definitions & check them in tests
• b1060798 - debug: log more info
• bc97d2cb - refactor: mod vshard
• a9501be1 - test: check vshard is reconfigured upon incarnation change
• cccf7d14 - test: move sharding related tests to test_sharding.py
• 935e5c2b - fix: pico.cas docs used to show incorrect update command

Compare with previous version

resolved all threads

merged