Invalidate all cached repository data on "clear cache" (issue-346)

Change-Id: I14404e38bbc6f5827c430849baf3c13f4df2c6ef

releases.moxie

 	- Fixed support for implied SSH urls in web.otherUrls (issue-311)
 	- Bind LDAP connection after establishing TLS initialization (issue-343)
 	- Fixed NPE when attempting to add a permission without a registrant (issue-344)
+	- Invalidate all cached repository data on "clear cache" (issue-346)
 	- Fix potential NPE on removing uncached repository from cache
 	- Ignore the default contents of .git/description file
 	- Fix error on generating activity page when there is no activity

src/main/java/com/gitblit/manager/RepositoryManager.java

 	public void resetRepositoryListCache() {
 		logger.info("Repository cache manually reset");
 		repositoryListCache.clear();
+		repositorySizeCache.clear();
+		repositoryMetricsCache.clear();
 	}
 
 	/**

src/main/java/com/gitblit/utils/ObjectCache.java

 		}
 	}
 
+	public void clear() {
+		cache.clear();
+	}
+
 	public boolean hasCurrent(String name, Date date) {
 		return cache.containsKey(name) && cache.get(name).date.compareTo(date) == 0;
 	}