ipaclient/library/ipa_facts.py: Fix version_info for new pre versions

With 4.6.90 pre versions have been introduced. The version parsing in
ipa_facts broke with this as it did not know about pre versions so far.

roles/ipaclient/library/ipa_facts.py

@@ -113,7 +113,8 @@ def get_ipa_version():
             # DEV versions look like:
             # 4.4.90.201610191151GITd852c00
             # 4.4.90.dev201701071308+git2e43db1
-            if part.startswith('dev') or 'GIT' in part:
+            # 4.6.90.pre2
+            if part.startswith('dev') or part.startswith('pre') or 'GIT' in part:
                 version_info.append(part)
             else:
                 version_info.append(int(part))