Revert "platform: Set RDMA protocol as default for trn1/trn1n platfor…

…ms" (#603)

This reverts commit 756214e.

Commit 756214e was previously merged so that RDMA protocol became the
default protocol used on TRN1 instances. This commit was made as RDMA
compatible firmware was deployed on all TRN1 instances. However, in
order to be able to utilize the new RDMA compatible firmware, users are
required to initiate a reboot on their instances. This comes with the
side-effect that the plugin will fail to initialize on TRN1's that have
no been rebooted. So, this commit will set the default protocol to SEND
RECEIVE so that users can use this plugin out of the box without having
to reboot their instance.

Signed-off-by: Hunter North <hunnorth@amazon.com>
Signed-off-by: Nicholas Sielicki <nslick@amazon.com>

src/platform-aws.c

@@ -97,14 +97,14 @@ struct ec2_platform_data {
 		.name = "trn1.32xlarge",
 		.gdr_required = true,
 		.net_flush_required = true,
-		.default_protocol = "RDMA",
+		.default_protocol = "SENDRECV",
 		.domain_per_thread = 1,
 	},
 	{
 		.name = "trn1n.32xlarge",
 		.gdr_required = true,
 		.net_flush_required = true,
-		.default_protocol = "RDMA",
+		.default_protocol = "SENDRECV",
 		.domain_per_thread = 1,
 	}
 };