opti:the logic of mndDoRebalance for clear

fix:stream memory leak

fix: udf plan error

enh(stream): the stream will start after vnode restore being completed.

release: upgrade default version

fix: an important fix

fix:open test cases for tmq & add log if rebalance error

* ench: increate testpackage.sh timeout seconds

* Update debRpmAutoInstall.sh

extend timeout to 30

add option enableScience on taos.cfg to show float and double scientific notation

fix: fix timestamp constant comparison precision error

enh: try to propose vnode commit at vnode closing

fix: optimizing 'alter table drop tag' error reporting

merge 3.0