This commit accepts the new xApp descriptor format and generate xApp helm
charts accordingly.
Please refer to https://wiki.o-ran-sc.org/display/RICA/xApp+descriptor
and
https://wiki.o-ran-sc.org/display/RICA/Schema+for+xApp+Descriptor
for the latest xapp descriptor format
Issue-ID: RIC-216
Signed-off-by: Zhe <zhehuang@research.att.com>
Change-Id: I5cd945814e131aef641d82ecfe33ad527bd19b31