ruby: replaces Time with Cycles in many places

The patch started of with replacing Time with Cycles in the Consumer class.
But to get ruby to compile, the rest of the changes had to be carried out.
Subsequent patches will further this process, till we completely replace
Time with Cycles.

src/mem/protocol/MI_example-cache.sm

@@ -30,8 +30,8 @@
 machine(L1Cache, "MI Example L1 Cache")
 : Sequencer * sequencer,
   CacheMemory * cacheMemory,
-  int cache_response_latency = 12,
-  int issue_latency = 2,
+  Cycles cache_response_latency = 12,
+  Cycles issue_latency = 2,
   bool send_evictions
 {