refactor: move xmodule folder to root

- Moving xmodule folder to root as we're dissolving sub-projects of common folder in edx-platform
    - More info: https://openedx.atlassian.net/browse/BOM-2579
- -e common/lib/xmodule has been removed from the requirements as xmodule has itself become the part of edx-platform and not being installed through requirements
- The test files common/lib/xmodule/test_files/ have been removed as they are not being used anymore

scripts/unit-tests.sh

@@ -116,7 +116,7 @@ case "${TEST_SUITE}" in
                 mv reports/${TEST_SUITE}.coverage reports/.coverage.commonlib
                 ;;
             [1-2])
-                paver test_lib -l common/lib/xmodule --disable_capture --eval-attr="shard==$SHARD" ${PAVER_ARGS} 2> common-tests.${SHARD}.log
+                paver test_lib -l ./xmodule --disable_capture --eval-attr="shard==$SHARD" ${PAVER_ARGS} 2> common-tests.${SHARD}.log
                 mv reports/${TEST_SUITE}.coverage reports/.coverage.commonlib.${SHARD}
                 ;;
             3|"noshard")

scripts/verify-dunder-init.sh

@@ -35,10 +35,14 @@ exclude+='|^common/test/data/?.*$'
 # in each chlid directory).
 # However, we do NOT want to exclude the source directories *within* the sub-projects.
 # Example:
-#  * common/lib/xmodule -> EXCLUDE from check.
-#  * common/lib/xmodule/xmodule/modulestore -> INCLUDE in check.
+#  * common/lib/capa -> EXCLUDE from check.
+#  * common/lib/capa/capa/safe_exec -> INCLUDE in check.
 exclude+='|^common/lib$'
-exclude+='|^common/lib/(capa|xmodule)$'
+exclude+='|^common/lib/capa$'
+
+# xmodule data folder
+exclude+='|^xmodule/tests/data/xml-course-root/capa$'
+exclude+='|^xmodule/tests/data/xml-course-root/uploads/python_lib_zip$'
 
 # Docs, scripts.
 exclude+='|^docs/.*$'