MAINT: LinkAhead rename

Summary

• in User Documentation (online, readmes, other doc folders)
• deprecate old imports
• add new ways to import
• search and replace in remaining files; change only if it has no functional implications
• Replace 'docs.indiscale.com` by new domain name. new issue

Test Environment

pipelines

Check List for the Author

Please, prepare your MR for a review. Be sure to write a summary and a focus and create gitlab comments for the reviewer. They should guide the reviewer through the changes, explain your changes and also point out open questions. For further good practices have a look at our review guidelines

• All automated tests pass
• Reference related issues
• Up-to-date CHANGELOG.md (or not necessary)
• Up-to-date JSON schema (or not necessary)
• Appropriate user and developer documentation (or not necessary)
  • How do I use the software? Assume "stupid" users.
  • How do I develop or debug the software? Assume novice developers.
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.

src/linkahead/connection/connection.py

@@ -28,6 +28,7 @@ from __future__ import absolute_import, print_function, unicode_literals
 import logging
 import ssl
 import sys
+from warnings import warn
 import warnings
 from builtins import str  # pylint: disable=redefined-builtin
 from errno import EPIPE as BrokenPipe
@@ -294,6 +295,14 @@ class _DefaultLinkAheadServerConnection(LinkAheadServerConnection):
             self._session.verify = verify
 
 
+class _DefaultCaosDBServerConnection(_DefaultLinkAheadServerConnection):
+    def __init__(self, *args, **kwargs):
+        warn(("The name _DefaultCaosDBServerConnection is deprecated. Please use "
+              "_DefaultLinkAheadServerConnection."),
+             DeprecationWarning)
+        super().__init__(*args, **kwargs)
+
+
 def _make_conf(*conf):
     """_make_conf.