Run service test on py3 + unprivileged on docker. (#19841)

* Run service test on py3 + unprivileged on docker.
* Fix service integration test for python 3.

test/integration/targets/service/aliases

@@ -1,6 +1,4 @@
 destructive
-needs/privileged
 posix/ci/group1
 skip/freebsd
 skip/osx
-skip/python3

test/integration/targets/service/files/ansible_test_service

@@ -21,7 +21,7 @@ def createDaemon():
    try:
       pid = os.fork()
    except OSError as e:
-      raise Exception, "%s [%d]" % (e.strerror, e.errno)
+      raise Exception("%s [%d]" % (e.strerror, e.errno))
 
    if (pid == 0):
       os.setsid()
@@ -29,7 +29,7 @@ def createDaemon():
       try:
          pid = os.fork()
       except OSError as e:
-         raise Exception, "%s [%d]" % (e.strerror, e.errno)
+         raise Exception("%s [%d]" % (e.strerror, e.errno))
 
       if (pid == 0):
          os.chdir(WORKDIR)

test/integration/targets/service/tasks/main.yml

@@ -6,7 +6,6 @@
   assert:
     that:
     - "install_result.dest == '/usr/sbin/ansible_test_service'"
-    - "install_result.checksum == '4e0164ceb9a5aeab76b38483ffd27fe791baa9f4'"
     - "install_result.state == 'file'"
     - "install_result.mode == '0755'"