Update module metadata to Puppet < 6.0.0

Manual changes per module repo.

35 PRs:
merged https://github.com/puppetlabs/puppetlabs-accounts/pull/90
merged https://github.com/puppetlabs/puppetlabs-acl/pull/103
merged https://github.com/puppetlabs/puppetlabs-apache/pull/1638
merged https://github.com/puppetlabs/puppetlabs-apt/pull/686
merged https://github.com/puppetlabs/puppetlabs-chocolatey/pull/80
merged https://github.com/puppetlabs/puppetlabs-concat/pull/459
merged https://github.com/puppetlabs/puppetlabs-dsc/pull/302
merged https://github.com/puppetlabs/puppetlabs-firewall/pull/709
merged https://github.com/puppetlabs/puppetlabs-haproxy/pull/282
merged https://github.com/puppetlabs/puppetlabs-hocon/pull/63
merged https://github.com/puppetlabs/puppetlabs-ibm_installation_manager/pull/53
merged https://github.com/puppetlabs/puppetlabs-iis/pull/83
merged https://github.com/puppetlabs/puppetlabs-inifile/pull/238
merged https://github.com/puppetlabs/puppetlabs-java/pull/247
merged https://github.com/puppetlabs/puppetlabs-java_ks/pull/184
merged https://github.com/puppetlabs/puppetlabs-mongodb/pull/380
merged https://github.com/puppetlabs/puppetlabs-motd/pull/72
merged https://github.com/puppetlabs/puppetlabs-mysql/pull/960
merged https://github.com/puppetlabs/puppetlabs-netscaler/pull/196
merged https://github.com/puppetlabs/puppetlabs-ntp/pull/404
merged https://github.com/puppetlabs/puppetlabs-postgresql/pull/889
merged https://github.com/puppetlabs/puppetlabs-powershell/pull/184
merged https://github.com/puppetlabs/puppetlabs-rabbitmq/pull/553
merged https://github.com/puppetlabs/puppetlabs-reboot/pull/132
merged https://github.com/puppetlabs/puppetlabs-registry/pull/133
merged https://github.com/puppetlabs/puppetlabs-sqlserver/pull/228
merged https://github.com/puppetlabs/puppetlabs-stdlib/pull/784
merged https://github.com/puppetlabs/puppetlabs-tagmail/pull/58
merged https://github.com/puppetlabs/puppetlabs-tftp/pull/53
merged https://github.com/puppetlabs/puppetlabs-tomcat/pull/219
merged https://github.com/puppetlabs/puppetlabs-vcsrepo/pull/337
merged https://github.com/puppetlabs/puppetlabs-vsphere/pull/125
merged https://github.com/puppetlabs/puppetlabs-websphere_application_server/pull/97
merged https://github.com/puppetlabs/puppetlabs-wsus_client/pull/72
merged https://github.com/puppetlabs/puppetlabs-xinetd/pull/97