Merge branch 'ctb/6082-api-use-default-kernel' into 'master'

The API servers should use the global default kernel to avoid downgrading unnecessarily

See merge request !775

shared/gstg-gprd/main.tf

@@ -259,7 +259,7 @@ module "api" {
   environment           = "${var.environment}"
   health_check          = "tcp"
   ip_cidr_range         = "${var.subnetworks["api"]}"
-  kernel_version        = "4.13.0-1007"
+  kernel_version        = "${var.default_kernel_version}"
   machine_type          = "${var.machine_types["api"]}"
   name                  = "api"
   node_count            = "${var.node_count["api"]}"
@@ -291,6 +291,7 @@ module "git" {
   health_check          = "tcp"
   ip_cidr_range         = "${var.subnetworks["git"]}"
   kernel_version        = "${var.default_kernel_version}"
+  kernel_version        = "${var.default_kernel_version}"
   machine_type          = "${var.machine_types["git"]}"
   name                  = "git"
   node_count            = "${var.node_count["git"]}"