Merge #391: Make the integration script more quiet

aa1bac3 Do not echo PATH (Tobin C. Harding)
534a648 Do not write error if bitcoind process not found (Tobin C. Harding)

Pull request description:

  Currently we have two initial output lines when running the integration test script. The first is confusing (to me at least) and the second is unnecessary it seems (please correct me if I am wrong).

  - Patch one removes the warning: `bitcoind: no process found`
  - Patch two removes the printing of `$PATH`

ACKs for top commit:
  apoelstra:
    ACK aa1bac3
  sanket1729:
    ACK aa1bac3

Tree-SHA512: be98b7e16839461573dd313596847f5f4572770d433c5a22a4891024d45d7199a2945e6d95c7f79237454dc68613b2605445b4ea4b52db30e1185a130ba25674

Author: sanket1729

integration_test/run.sh

@@ -7,9 +7,7 @@ rm -rf ${TESTDIR}
 mkdir -p ${TESTDIR}/1
 
 # To kill any remaining open bitcoind.
-killall -9 bitcoind
-
-echo $PATH
+killall -9 bitcoind 2> /dev/null
 
 BLOCKFILTERARG=""
 if bitcoind -version | grep -q "v0\.\(19\|2\)"; then