HPCC-12288 agentexec looks for config in code dir

Currently agentexec looks for the config file in the execution directory
given by argv[0]. Luckily this worked since argv[0] did not include the
path. This pull requests corrects this problem by looking in the current
directory.

Signed-off-by: William Whitehead william.whitehead@lexisnexis.com
Merge pull request #6511 from RussWhitehead/agentexec

HPCC-12288 agentexec.cpp contains code to look for agentexec.xml in the ...

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>