move common code into server, update tests and makefile (#2425)

* move common code into server, update tests and makefile

remove backend directory, refactor

update smoke tests

.bumpversion.cfg

@@ -2,13 +2,13 @@
 current_version = 0.18.0
 commit = True
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(?:-(?P<prerel>rc)\.(?P<prerelversion>\d+))?
-serialize = 
+serialize =
 	{major}.{minor}.{patch}-{prerel}.{prerelversion}
 	{major}.{minor}.{patch}
 
 [bumpversion:part:prerel]
 optional_value = release
-values = 
+values =
 	rc
 	release
 
@@ -20,6 +20,6 @@ replace = version="{new_version}"
 search = "version": "{current_version}"
 replace = "version": "{new_version}"
 
-[bumpversion:file:backend/server/__init__.py]
+[bumpversion:file:server/__init__.py]
 search = __version__ = "{current_version}"
 replace = __version__ = "{new_version}"