Bug 1923893

Description of problem:
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Unable to create a ceph user for a cephfs which has "-" in the name, it is failing with "Error EINVAL: mon capability parse failed, stopped at '-ec' of 'allow r fsname=cephfs-ec'"
 
Followed the doc to generate a new ceph user :
----------------------------------------------  https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/4/html-single/file_system_guide/index#creating-client-users-for-a-ceph-file-system_fs

Version : ceph version 16.0.0-9150.el8cp

Steps to Reproduce:
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Create a cephFS with default values (it created client.admin keyring file)
Create a 2nd filesystem (multifs is supported from RHCS5.0).

[root@magna030 ~]# ceph fs ls
name: cephfs-ec, metadata pool: cephfs-metadata-ec, data pools: [cephfs-data-ec ]
name: cephfs, metadata pool: cephfs.cephfs.meta, data pools: [cephfs.cephfs.data ]

User creation works for the existing fs with a single word without any special characters. 

[root@magna030 ~]# ceph fs authorize cephfs client.admin /mnt/kcephfs30/ rwp
Error EINVAL: client.admin already has fs capabilities that differ from those supplied. To generate a new auth key for client.admin, first remove client.admin from configuration files, execute 'ceph auth rm client.admin', then execute this command again.
[root@magna030 ~]# ceph fs authorize cephfs client.admin1 /mnt/kcephfs30/ rwp
[client.admin1]
        key = AQBNxRdg1vLmEBAAqOitUweGVdWI+T8qO4AOXg==

In order to mount the new FS (with "-" in it's name) on clients, I wanted to create another user with different capabilities by restricting it only to a particular path. 


[root@magna030 ~]# ceph fs authorize cephfs-ec client.admin2 /mnt/kcephfs30/ rwp
Error EINVAL: mon capability parse failed, stopped at '-ec' of 'allow r fsname=cephfs-ec'

It's failing as the filesystem name was created with "cephfs-ec"

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