[AAI] Fix truststore password to avoid exceptions

[AAI] Fix truststore password to avoid exceptions

Deployment of aai-resources sometimes fails with exception:

org.springframework.expression.ParseException:
Expression [BH#{XS@*#xoUULIO)eQkxaBA] @2: No ending suffix
'}' for expression starting at character 2: #{XS@*#xoUULIO)eQkxaBA

which basically means that aai-resources (and probably aai-traversal)
are unable to handle special characters that AAF is putting into cert
passwords. To avoid random AAI failures let's use a know method
proposed by Sylvain Desbureaux and just set passwords that contains
only alphanumeric characters.

Issue-ID: OOM-1
Change-Id: I248c2de6e59e4fc073b5a06f6409802634b254cf
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>