Combined GTM patch includes:
Cherry-picked commits:
- reduced GTM logging level
- Nikhil's memory context usage fix
Backported from StormDB:
- text format of gtm.control file
- periodical save of gtm.control file (each 1000 generated xids and after sequence is modified)
Missing break; in a switch statement caused error when replaying
a command on GTM standby.
GTM master did not complete message to create sequence to Standby,
so sequences was not created on the Standby
Do not restore records from register.node, it may cause problem
with GTM Standby and is not used on GTM.