reorganize placeholder data call to live with provisioner implementation; force users to use the generated function, therefore forcing validation, for all variables except winrmpassword, by doing a simple string check against the placeholder data.

Rather than using reflection to grab the whole SSH config, for now just use the config convenience functions to get the majority of needed values

generated func now validates based on data provided in context, which needs to include the future values if it is to be interpolated properly.

prepare_changelog: Update regex to work with GNU grep

rename galaxy_command to galaxycommand

amazon-ebssurrogate plugin:  StepSnapshotVolumes: Added mutex to synchronise map access across threads. (#8432)

Fix request retry mechanism  to launch aws instance

Fix tags & modernize config for HyperOne builder

make sure we continue to default to Megabytes for qemu disk size to p…

This reverts commit 30ccab47 which introduced the issue 8436. 

the docs generator from code PR #7724  mis scrapped it

Don't cache when TargetPath is non-nil