Current renaming rule of debian/scylla-* files is buggy, it fails to
install some .service files when custom product name specified.
Introduce regex based rewriting instead of adhoc renaming, and fixed
wrong renaming rule.
Fixes scylladb/scylla#8113
Closes#158
* github.com:scylladb/scylla-jmx:
dist/debian: fix renaming debian/scylla-* files rule
dist/debian: sync packaging script with scylla main repo
Current renaming rule of debian/scylla-* files is buggy, it fails to
install some .service files when custom product name specified.
Introduce regex based rewriting instead of adhoc renaming, and fixed
wrong renaming rule.
Related scylladb/scylla#8113
shutil.rmtree(ignore_errors=True) was for ignores error when directory not exist,
but it also ignores permission error, so we shouldn't use that.
Run os.path.exists() before shutil.rmtree() instead.
See scylladb/scylla#7337
Now we generate dist/changelog on relocatable package generation time,
we cannot run '.rc' fixup on .deb package building time, need to do it
in debian_files_gen.py.
Drop dependency on pystache since it nolong present in Fedora 32.
To implement it, simplified debian package build process.
It will be generate debian/ directory when building relocatable package,
we just need to run debuild using the package.
To generate debian/ directory this commit added debian_files_gen.py,
it construct whole directory including control and changelog files
from template files.
Since we need to stop pystache, these template files swiched to
string.Template class which is included python3 standard library.
see: https://github.com/scylladb/scylla/pull/6313
