Fixed Javadoc ommission

[arjantijms]

Signed-off-by: arjantijms [email protected]

[arjantijms]

Javadoc parameter was missing.

This flagged a warning like the following when building:

1 warning
[WARNING] Javadoc Warnings
[WARNING] /security-api/src/main/java/javax/security/enterprise/SecurityContext.java:64: warning: no @param for <T>
[WARNING] <T extends Principal> Set<T> getPrincipalsByType(Class<T> pType);
[WARNING] ^

Change is at

https://github.com/eclipse-ee4j/security-api/compare/master...arjantijms:fix-javadoc?expand=1#diff-bc04a2271a58599af6b43c56780ef4daR61

(There's also the trailing white space removal in this commit. A commit that fixes this in the entire repo will be done after this)