fix jdc sigterm signalling issue #1197

Job	Run time
bad-pool-config-test	3m 20s
interop-jd-translator	1m 38s
interop-proxy-with-multi-ups	1m 2s
interop-proxy-with-multi-ups-extended	50s
jds-do-not-fail-on-wrong-tsdatasucc	48s
jds-do-not-panic-if-jdc-close-connection	56s
jds-do-not-stackoverflow-when-no-token	59s
jds-receive-solution-while-processing-declared-job	3m 21s
pool-sri-test-1-standard	3m 10s
pool-sri-test-close-channel	2m 17s
pool-sri-test-extended_0	2m 53s
pool-sri-test-extended_1	3m 11s
pool-sri-test-reject-auth	3m 19s
standard-coverage	3m 7s
sv1-test	2m 46s
translation-proxy-broke-pool	2m 19s
translation-proxy-old-share	2m 15s
Aggregate MG Test Results	1s
	38m 12s

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