Increase stack size to fix unstable test in bundle-plugin
Increase stack size to fix unstable test in bundle-plugin

ExportPackageParserTest.require_that_long_string_literals_do_not_cause_stack_overflow_error() fails on Travis-CI for Vespa 7 build
vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa