Remove file path hardcodes

Make tests runnable in IDE.

Change-Id: I9901c10c319687a10616f634fca25297cf84df3a
Issue-ID: VNFSDK-375
Signed-off-by: Zebek Bogumil <bogumil.zebek@nokia.com>
diff --git a/vnfsdk_pkgtools/util.py b/vnfsdk_pkgtools/util.py
new file mode 100644
index 0000000..78010e2
--- /dev/null
+++ b/vnfsdk_pkgtools/util.py
@@ -0,0 +1,8 @@
+import os
+
+import vnfsdk_pkgtools
+
+
+def get_project_root():
+    """Returns project root folder."""
+    return os.path.abspath(os.path.join(os.path.dirname(vnfsdk_pkgtools.__file__),os.pardir))