scripted-diff: Rename test_bitcoin to test/setup_common

-BEGIN VERIFY SCRIPT-
sed -i --regexp-extended -e 's/test_bitcoin\.(h|cpp)/setup_common.\1/g' $(git grep -l test_bitcoin)
git mv ./src/test/test_bitcoin.h   ./src/test/setup_common.h
git mv ./src/test/test_bitcoin.cpp ./src/test/setup_common.cpp
sed -i -e 's/BITCOIN_TEST_TEST_BITCOIN_H/BITCOIN_TEST_SETUP_COMMON_H/g' ./src/test/setup_common.h
-END VERIFY SCRIPT-

src/test/README.md

@@ -42,7 +42,7 @@ unit tests as possible).
 
 The build system is setup to compile an executable called `test_bitcoin`
 that runs all of the unit tests.  The main source file is called
-test_bitcoin.cpp. To add a new unit test file to our test suite you need
+setup_common.cpp. To add a new unit test file to our test suite you need
 to add the file to `src/Makefile.test.include`. The pattern is to create
 one test file for each class or source file for which you want to create
 unit tests.  The file naming convention is `<source_filename>_tests.cpp`