fix deprecation in bitcoin-util-test.py #13953

1. 
   isghe commented at 1:07 PM on August 13, 2018: contributor

   To avoid:

   $ make check {…omissis…} Running test/util/bitcoin-util-test.py... /usr/local/bin/python3.7 ../test/util/bitcoin-util-test.py ../test/util/bitcoin-util-test.py:31: DeprecationWarning: This method will be removed in future versions. Use 'parser.read_file()' instead. config.readfp(open(os.path.join(os.path.dirname(file), "../config.ini"), encoding="utf8"))

   $ python3 --version Python 3.7.0

2. fix deprecation in bitcoin-util-test.py

   To avoid:
   
   $ make check
   {…omissis…}
   Running test/util/bitcoin-util-test.py...
   /usr/local/bin/python3.7 ../test/util/bitcoin-util-test.py
   ../test/util/bitcoin-util-test.py:31: DeprecationWarning: This method will be removed in future versions.  Use 'parser.read_file()' instead.
   config.readfp(open(os.path.join(os.path.dirname(__file__), "../config.ini"), encoding="utf8"))
   
   $ python3 --version
   Python 3.7.0

   49e56625aa
3. fanquake added the label Tests on Aug 13, 2018
4. MarcoFalke added this to the milestone 0.18.0 on Aug 13, 2018
5. 
   fanquake commented at 1:12 PM on August 13, 2018: member

   read_file() has been available since 3.2, so this doesn't increase the minimum Python requirement.

6. 
   domob1812 commented at 1:32 PM on August 13, 2018: contributor

   utACK 49e56625aa2e102472f782e7421a332b4f438f54

7. MarcoFalke referenced this in commit 6edda062dc on Aug 13, 2018
8. MarcoFalke merged this on Aug 13, 2018
9. MarcoFalke closed this on Aug 13, 2018

   ---

10. isghe deleted the branch on Aug 13, 2018
11. PastaPastaPasta referenced this in commit 9c6021a589 on May 26, 2021
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13. PastaPastaPasta referenced this in commit 934e4a3a0b on Jun 28, 2021
14. PastaPastaPasta referenced this in commit c1acf3e670 on Jun 29, 2021
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17. PastaPastaPasta referenced this in commit 76512bc293 on Jun 29, 2021
18. PastaPastaPasta referenced this in commit 326592470a on Jun 29, 2021
19. MarcoFalke locked this on Sep 8, 2021

Milestone
0.18.0