systems/test/run.sh to pass through VIRTUAL_ENV and PERL5LIB

Description

Have tests/system use required Python (dnspython) and PERL modules (Digest::HMAC and Net::DNS) from user directories, avoid using privileges.

Request

Have run.sh pass Python virtualenv variable VIRTUAL_ENV and PERL's PERL5LIB from user environment to make (gmake).

--- run.sh.in.orig	2022-06-16 10:52:39.000000000 +0100
+++ run.sh.in	2022-06-16 11:00:23.000000000 +0100
@@ -90,6 +90,8 @@
         LOG_FLAGS="$log_flags" \
         TEST_LARGE_MAP="${TEST_LARGE_MAP}" \
         CI_ENABLE_ALL_TESTS="${CI_ENABLE_ALL_TESTS}" \
+	${VIRTUAL_ENV:+"VIRTUAL_ENV=${VIRTUAL_ENV}"} \
+	${PERL5LIB:+"PERL5LIB=${PERL5LIB}"} \
         make -e check
     exit $?
 fi

Note: The pythonenv must be setup to use the same version of python as the test uses, for example /usr/bin/python.

Links / references

Python's virtual environments are well documented.

• Virtual Environments and Packages

Perl's use of PERL5LIB is not so well documented,

• Search www.perl.COM for PERL5LLIB.
• A good summary can be found on Stackoverlflow