tests: retrofit healthcheck system tests

All the healthcheck return output now but systems tests is written to
expect empty output which seems wrong.

Modify jq output to contain newline character rather than actual newline

Signed-off-by: Aditya R <arajan@redhat.com>

test/system/220-healthcheck.bats

@@ -18,7 +18,7 @@ function _check_health {
         # (kludge to deal with parse_table and empty strings)
         if [ "$expect" = "''" ]; then expect=""; fi
 
-        actual=$(jq -r ".$field" <<<"$output")
+        actual=$(jq ".$field" <<<"$output")
         is "$actual" "$expect" "$testname - .State.Healthcheck.$field"
     done
 }
@@ -77,10 +77,10 @@ EOF
     is "$output" "" "output from 'podman healthcheck run'"
 
     _check_health "All healthy" "
-Status           | healthy
+Status           | \"healthy\"
 FailingStreak    | 0
 Log[-1].ExitCode | 0
-Log[-1].Output   |
+Log[-1].Output   | \"Life is Good on stdout\\\nLife is Good on stderr\"
 "
 
     # Force a failure
@@ -88,19 +88,19 @@ Log[-1].Output   |
     sleep 2
 
     _check_health "First failure" "
-Status           | healthy
+Status           | \"healthy\"
 FailingStreak    | [123]
 Log[-1].ExitCode | 1
-Log[-1].Output   |
+Log[-1].Output   | \"Uh-oh on stdout!\\\nUh-oh on stderr!\"
 "
 
     # After three successive failures, container should no longer be healthy
     sleep 5
     _check_health "Three or more failures" "
-Status           | unhealthy
+Status           | \"unhealthy\"
 FailingStreak    | [3456]
 Log[-1].ExitCode | 1
-Log[-1].Output   |
+Log[-1].Output   | \"Uh-oh on stdout!\\\nUh-oh on stderr!\"
 "
 
     # healthcheck should now fail, with exit status 1 and 'unhealthy' output