Allow running sss_analyze without Python modules for systemd.
Upstream PR: https://github.com/SSSD/sssd/pull/6125

diff --git a/src/tools/analyzer/modules/request.py b/src/tools/analyzer/modules/request.py
index b96a23c05..28ac2f194 100644
--- a/src/tools/analyzer/modules/request.py
+++ b/src/tools/analyzer/modules/request.py
@@ -1,8 +1,6 @@
 import re
 import logging
 
-from sssd.source_files import Files
-from sssd.source_journald import Journald
 from sssd.parser import SubparsersAction
 from sssd.parser import Option
 
@@ -77,8 +75,10 @@ class RequestAnalyzer:
             Instantiated source object
         """
         if args.source == "journald":
+            from sssd.source_journald import Journald
             source = Journald()
         else:
+            from sssd.source_files import Files
             source = Files(args.logdir)
         return source
 
@@ -143,7 +143,7 @@ class RequestAnalyzer:
             self.consumed_logs.append(line.rstrip(line[-1]))
         else:
             # files source includes newline
-            if isinstance(source, Files):
+            if type(source).__name__ == 'Files':
                 print(line, end='')
             else:
                 print(line)
@@ -225,7 +225,7 @@ class RequestAnalyzer:
         source.set_component(component, False)
         self.done = ""
         for line in self.matched_line(source, patterns):
-            if isinstance(source, Journald):
+            if type(source).__name__ == 'Journald':
                 print(line)
             else:
                 self.print_formatted(line, args.verbose)
ix/log/gnu/home/services/xdg.scm'>
<input type='hidden' name='id' value='59d3f1ab3fa63e6ccf7afbb5dcd397980b36f68a'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=59d3f1ab3fa63e6ccf7afbb5dcd397980b36f68a'>root</a>/<a href='/guix/log/gnu?id=59d3f1ab3fa63e6ccf7afbb5dcd397980b36f68a'>gnu</a>/<a href='/guix/log/gnu/home?id=59d3f1ab3fa63e6ccf7afbb5dcd397980b36f68a'>home</a>/<a href='/guix/log/gnu/home/services?id=59d3f1ab3fa63e6ccf7afbb5dcd397980b36f68a'>services</a>/<a href='/guix/log/gnu/home/services/xdg.scm?id=59d3f1ab3fa63e6ccf7afbb5dcd397980b36f68a'>xdg.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/home/services/xdg.scm?id=59d3f1ab3fa63e6ccf7afbb5dcd397980b36f68a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>