tests: Reduce iterations / threads

* tests/gpg/t-gpgconf.c (main): Reduce iterations to 10.
* tests/gpg/t-thread-keylist-verify.c,
tests/gpg/t-thread-keylist.c (THREAD_COUNT): Reduce to 10.

--
While these tests tested for race conditions a smaller number
of iteration should still show problems if they are run on
multiple systems and regulary. While the 100 Thread count in
the t-thread tests could lead to resource problems.

tests/gpg/t-gpgconf.c

@@ -256,7 +256,7 @@ main (void)
   gpgme_conf_comp_t conf;
   gpgme_conf_comp_t comp;
   int first;
-  int i, N = 100;
+  int i, N = 10;
 
   init_gpgme (GPGME_PROTOCOL_GPGCONF);
 

tests/gpg/t-thread-keylist-verify.c

@@ -32,7 +32,7 @@
 
 #include "t-support.h"
 
-#define THREAD_COUNT 100
+#define THREAD_COUNT 10
 
 static const char test_text1[] = "Just GNU it!\n";
 static const char test_sig1[] =

tests/gpg/t-thread-keylist.c

@@ -32,7 +32,7 @@
 
 #include "t-support.h"
 
-#define THREAD_COUNT 100
+#define THREAD_COUNT 10
 
 void *
 start_keylist (void *arg)