If a profile property contains [...], it is interpreted as JSONArray, even if not multivalued

[rdenarie]

Steps to reproduce

Steps to reproduce the behavior:

1. Create a space with name '[Space Name]'
2. OR : create a new mono valued profile property and fill with '[MyValue]'

In https://github.com/Meeds-io/social/blob/develop/component/core/src/main/java/org/exoplatform/social/core/jpa/storage/EntityConverterUtils.java#L174

It is interpreted as JSON Array, even if the property is not multivalued.

Current behaviour

One possible effet is :
If you put [SpaceNmae] in spaceName, then, the avatar is not correctly generated and there is a trace is server log.

I suspect possible problem with the user profile, but didnt test.

Expected behavior

To analyze if the property is multivalued or not, we should rely on the property configuration instead of the value of the attribute.
We should ask to PropertySettingsService is the property is multivalued.