fix: incorrect Boolean.getBoolean usage in ScepConfiguration

[CiiLu]

Describe your changes

ScepConfiguration currently uses Boolean#getBoolean , that reads the given string as a property name and the looks at what the value of that property is and parse it.It didn't parse the given value to boolean.

It leads that some invoke returns unexpected value.

Such as

ejbca-ce/modules/ejbca-common/src/org/ejbca/config/ScepConfiguration.java

Line 263 in 3eca262

return Boolean.getBoolean(DEFAULT_CLIENT_CERTIFICATE_RENEWAL);

expected true, actually false'

Checklist before requesting a review

• I have performed a self-review of my code
• I have kept the patch limited to only change the parts related to the patch
• This change requires a documentation update

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