afs_Conn must be called within the analyze loop

afs_Conn must be called within the analyze loop

afs_Analyze calls afs_PutConn, so each pass through the
afs_Analyze loop must call afs_Conn to get a new connection handle.

afs_CacheStoreVCache (part of the fetchstore refactoring) wasn't doing
this, and so producing garbage data upon retries.

Reviewed-on: http://gerrit.openafs.org/674
Tested-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>