WIP: Java imports tracing

Cmmnbuild_dep_manager Manager class injects jpype module to be able to track which java packages were used and report it to remote server. Implementation supports jpype versions 0.6.3 and >0.7. For the purpose of jpype imports testing, multiprocess tests execution was added using pytest-xdist library. Old tests were adjusted to work in distributed mode

cmmnbuild_dep_manager/tests/conftest.py

@@ -4,11 +4,9 @@ import pytest
 
 from cmmnbuild_dep_manager.cmmnbuild_dep_manager import PKG_MODULES_JSON
 
-
-TMP_PKG_MODULES_JSON = (
-        PKG_MODULES_JSON.parent / ("_test_" + PKG_MODULES_JSON.name))
+TMP_PKG_MODULES_JSON = (PKG_MODULES_JSON.parent / ("_test_" + PKG_MODULES_JSON.name))
 LIB_DIR = PKG_MODULES_JSON.parent / 'lib'
-TMP_LIB_DIR = PKG_MODULES_JSON.parent / '_test_lib'
+TMP_LIB_DIR = PKG_MODULES_JSON.parent / '_test_lib_'
 
 
 @pytest.fixture(autouse=True, scope="session")
@@ -33,8 +31,10 @@ def autoclean_modules_json():
     try:
         yield
     finally:
-        shutil.rmtree(LIB_DIR)
-        PKG_MODULES_JSON.unlink()
+        if LIB_DIR.exists():
+            shutil.rmtree(LIB_DIR)
+        if PKG_MODULES_JSON.exists():
+            PKG_MODULES_JSON.unlink()
         if TMP_PKG_MODULES_JSON.exists():
             TMP_PKG_MODULES_JSON.rename(PKG_MODULES_JSON)
         if TMP_LIB_DIR.exists():