[Azure]Fix issues for Azure image validation

Signed-off-by: Yuxin Sun <[email protected]>

os_tests/data/azure/91-azure_datasource.cfg

@@ -1,5 +1,4 @@
+datasource_list: [ Azure ]
 datasource:
-  Azure:
-    apply_network_config: false
-datasource_list:
-- Azure
+   Azure:
+      apply_network_config: False

os_tests/data/azure/grub_rhel9

@@ -1,7 +1,12 @@
-GRUB_CMDLINE_LINUX=""
 GRUB_TIMEOUT=10
+GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
+GRUB_DEFAULT=saved
+GRUB_DISABLE_SUBMENU=true
+GRUB_TERMINAL_OUTPUT="console"
+GRUB_CMDLINE_LINUX="loglevel=3 crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M console=tty1 console=ttyS0,115200n8 earlyprintk=ttyS0,115200 net.ifnames=0"
+GRUB_DISABLE_RECOVERY="true"
 GRUB_ENABLE_BLSCFG=true
-GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"
-GRUB_TERMINAL_INPUT="serial console"
-GRUB_TERMINAL_OUTPUT="serial console"
-GRUB_DEFAULT=saved
+
+GRUB_TIMEOUT_STYLE=countdown
+GRUB_TERMINAL="serial console"
+GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"