Test(git): set commit.gpgsign to false

If a user has run `git config --global commit.gpgsign true`,
git-related tests fail since the test users do not exist and gpg cannot
sign.

Tests/CTestUpdateGIT.cmake.in

@@ -19,6 +19,8 @@ message(" git = ${GIT}")
 set(AUTHOR_CONFIG "[user]
 \tname = Test Author
 \temail = testauthor@cmake.org
+[commit]
+\tgpgsign = false
 ")
 
 #-----------------------------------------------------------------------------

Tests/ExternalProjectUpdate/CMakeLists.txt

@@ -95,6 +95,7 @@ if(do_git_tests)
     GIT_TAG ${TEST_GIT_TAG}
     GIT_CONFIG "user.email=testauthor@cmake.org"
                "user.name=testauthor"
+               "commit.gpgsign=false"
     CMAKE_GENERATOR "${CMAKE_GENERATOR}"
     CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
     INSTALL_COMMAND ""

Tests/RunCMake/CMP0150/CMakeLists.txt

@@ -20,6 +20,7 @@ function(initGitRepo workDir)
   execGitCommand("${workDir}" config user.email "testauthor@cmake.org")
   execGitCommand("${workDir}" config user.name testauthor)
   execGitCommand("${workDir}" config core.autocrlf false)
+  execGitCommand("${workDir}" config commit.gpgsign false)
   execGitCommand("${workDir}" add CMakeLists.txt)
   execGitCommand("${workDir}" commit -m "Initial commit")
 endfunction()

Tests/RunCMake/ExternalProject/FetchGitRefs.cmake

@@ -47,6 +47,7 @@ endfunction()
 execGitCommand(-c init.defaultBranch=master init)
 execGitCommand(config --add user.email "testauthor@cmake.org")
 execGitCommand(config --add user.name testauthor)
+execGitCommand(config commit.gpgsign "false")
 
 # Create the initial repo structure
 execGitCommand(add firstFile.txt)