Convert 'int i' to 'size_t i' in tests/ files

Convert the type of loop iterators named 'i', 'j', k',
'ii', 'jj', 'kk', to be 'size_t' instead of 'int' or
'unsigned int', also santizing 'ii', 'jj', 'kk' to use
the normal 'i', 'j', 'k' naming

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

tests/nodeinfotest.c

@@ -123,7 +123,7 @@ static int
 mymain(void)
 {
     int ret = 0;
-    int i;
+    size_t i;
     const char *nodeData[] = {
         "test1",
 # if !(defined(__powerpc__) ||                  \