ADE: Support for RHEL 6.10

I tried to encrypt the OS disk on Redhat 6.10 and got the following errors from azure cli:
```
VM has reported a failure when processing extension 'AzureDiskEncryptionForLinux'. Error message: "Distro redhat 6.10 is not supported for OS encryption"
```

Then I tried encrypting the data disk and got the following error in the log:
```
[Microsoft.Azure.Security.AzureDiskEncryptionForLinux-1.0]: 2446: [Error] Failed to encrypt data volumes with error: Encryption failed for name:sdd1 type:part fstype:ext4 mountpoint:/datadisk label: model: size:10733958144 majmin:8:49 device_id:f8b3781b-1e82-4818-a1c3-63d806ec15bb, stack trace: Traceback (most recent call last):
File "/var/lib/waagent/Microsoft.Azure.Security.AzureDiskEncryptionForLinux-1.1.0.31/main/handle.py", line 1551, in daemon_encrypt
os_items_to_stamp=os_items_to_stamp):
File "/var/lib/waagent/Microsoft.Azure.Security.AzureDiskEncryptionForLinux-1.1.0.31/main/handle.py", line 1777, in daemon_encrypt_data_volumes
raise Exception(message)
Exception: Encryption failed for name:sdd1 type:part fstype:ext4 mountpoint:/datadisk label: model: size:10733958144 majmin:8:49 device_id:f8b3781b-1e82-4818-a1c3-63d806ec15bb

[Microsoft.Azure.Security.AzureDiskEncryptionForLinux-1.0]: [StatusReport (1)] op: EnableEncryptionDataVolumes
[Microsoft.Azure.Security.AzureDiskEncryptionForLinux-1.0]: [StatusReport (1)] status: error
[Microsoft.Azure.Security.AzureDiskEncryptionForLinux-1.0]: [StatusReport (1)] code: 19
[Microsoft.Azure.Security.AzureDiskEncryptionForLinux-1.0]: [StatusReport (1)] msg: Failed to encrypt data volumes with error: Encryption failed for name:sdd1 type:part fstype:ext4 mountpoint:/datadisk label: model: size:10733958144 majmin:8:49 device_id:f8b3781b-1e82-4818-a1c3-63d806ec15bb, stack trace: Traceback (most recent call last):
File "/var/lib/waagent/Microsoft.Azure.Security.AzureDiskEncryptionForLinux-1.1.0.31/main/handle.py", line 1551, in daemon_encrypt
os_items_to_stamp=os_items_to_stamp):
File "/var/lib/waagent/Microsoft.Azure.Security.AzureDiskEncryptionForLinux-1.1.0.31/main/handle.py", line 1777, in daemon_encrypt_data_volumes
raise Exception(message)
Exception: Encryption failed for name:sdd1 type:part fstype:ext4 mountpoint:/datadisk label: model: size:10733958144 majmin:8:49 device_id:f8b3781b-1e82-4818-a1c3-63d806ec15bb
```

Could you let us know if you plan to support the Redhat 6.10 distro ?