we now launch pegasus plan on the sub workflows via pegasus lite when the parent workflow is running. as a result relative paths for input dir and output dir break.

for example. currently users need to specify full path
adag xmlns="http://pegasus.isi.edu/schema/DAX" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pegasus.isi.edu/schema/DAX http:
//pegasus.isi.edu/schema/dax-3.6.xsd" version="3.6" name="local-hierarchy">
<metadata key="dax.api">python</metadata>
<dax id="ID0000001" file="blackdiamond.dax">
<argument>--input-dir /lfs1/scratch/vahi/045-hierarchy-sharedfs/input --output-site local -vvv</argument>
</dax>
<dax id="ID0000002" file="sleep.dax">
<argument>--output-site local -vvv</argument>
</dax>
</adag>
-bash-4.2$