Cleaning up log entries in server.log

Issue

We are noticing that the log files are filled up with entries and it's becoming not useful and difficult to locate and look for the actual errors from the server.log files.

2014-07-11 06:52:38,264 WARN  [org.jboss.security.auth.spi.LdapExtLoginModule] Invalid or misspelled option: debug
2014-07-11 06:52:38,264 WARN  [org.jboss.security.auth.spi.LdapExtLoginModule] Invalid or misspelled option: realm

from login-config.xml

<login-module code="org.jboss.security.auth.spi.LdapExtLoginModule" flag="optional" >
            <module-option name="debug">true</module-option>
            <module-option name="java.naming.provider.url">ldapurl</module-option>
            <module-option name="java.naming.security.protocol">ssl</module-option>
            <module-option name="realm">admin</module-option>
            <module-option name="bindDN">xxxxxxxxxxx</module-option>
            <module-option name="bindCredential">xxxxxxxxxxxx</module-option>
            <module-option name="baseFilter">(uid={0})</module-option>
            <module-option name="baseCtxDN">ou=people,dc=gene,dc=com</module-option>
            <module-option name="roleFilter">(uniquemember={1})</module-option>
            <module-option name="roleAttributeID">cn</module-option>
            <module-option name="rolesCtxDN">ou=Groups,ou=ESB,ou=Applications,dc=gene,dc=com</module-option>
            <module-option name="roleAttributeIsDN">false</module-option>
            <module-option name="roleRecursion">2</module-option>
            <module-option name="searchScope">ONELEVEL_SCOPE</module-option>
            <module-option name="java.naming.referral">follow</module-option>
            <module-option name="searchTimeLimit">10000</module-option>
         </login-module>