Changes to pass all posix PJD tests

1. Test suite uses /dev/urandom to generate random names for the files that it creates.
2. When used with SplitFS, /dev/urandom (handled by SplitFS) always returns 0 causing the same random number to be generated for all files. This affects the tests that do comparison between two different files --- they end up being compared with themselves due to same name generated.

Delegate the non-regular file operations to posix - this was already done but only for tar workloads.
This change does the same for all workloads.

Author: OmSaran

splitfs/fileops_hub.c

@@ -639,7 +639,6 @@ RETT_OPEN _hub_OPEN(INTF_OPEN)
 
 #endif
 
-#if WORKLOAD_TAR | WORKLOAD_GIT | WORKLOAD_RSYNC
 
 	if(path[0] == '/' && path[1] == 'v' && path[2] == 'a' && path[3] == 'r') {
 		op_to_use = _hub_fileops;
@@ -692,7 +691,6 @@ RETT_OPEN _hub_OPEN(INTF_OPEN)
 
 	}
 
-#endif // WORKLOAD_TAR
 
 	// op_to_use = _hub_managed_fileops;	
 	assert(op_to_use != NULL);