tests: check for up to 20s if postgresql is running

Grep for the whole path of the binary because its basename is the same
as the name of the user all this is running under.

tests/config.yaml

@@ -7,6 +7,8 @@ service:
 packages:
     rpms:
         - postgresql-server
+        # seq
+        - coreutils
 testdependecies:
     rpms:
         - postgresql
@@ -26,8 +28,20 @@ module:
         repos:
             - https://kojipkgs.fedoraproject.org/repos/module-d87b0b15567e47f3-build/latest/x86_64/
 test:
-    processrunning:
-        - 'ls  /proc/*/exe -alh | grep postgres'
+    process_running:
+        - |
+            up=0
+            for i in `seq 20`; do
+                echo "Checking for /usr/bin/postgres process... ($i)"
+                if ls /proc/*/exe -alh 2>/dev/null | grep /usr/bin/postgres; then
+                    echo "Found."
+                    up=1
+                    break
+                else
+                    sleep 1
+                fi
+            done
+            test "$up" -ne 0
 testhost:
     selfcheck:
         - 'env PGPASSWORD=mtftest psql -h localhost -U mtftest -f test.sql | egrep "anything|something"'