gbproxy: Increase TLLI cache timeout to 10s

The range of SUSPEND/RESUME timers T3/T4 is up to 10s so we should keep
the cache entries valid for this time.

Fixes: OS#4895
Change-Id: I9e88e49981098831f3255938deb868f4503f650f
Related: SYS#5235
diff --git a/src/gbproxy/gb_proxy.c b/src/gbproxy/gb_proxy.c
index 91324dd..7f8260c 100644
--- a/src/gbproxy/gb_proxy.c
+++ b/src/gbproxy/gb_proxy.c
@@ -1413,7 +1413,7 @@
 	cfg->pool.bvc_fc_ratio = 100;
 	cfg->pool.null_nri_ranges = osmo_nri_ranges_alloc(cfg);
 	/* TODO: Make configurable */
-	cfg->tlli_cache.timeout = 5;
+	cfg->tlli_cache.timeout = 10;
 
 	hash_init(cfg->bss_nses);
 	hash_init(cfg->sgsn_nses);