The spec template has been modified to get the Tomcat version
from the installed Tomcat instead of pre-defined constant. This
allows TomcatJSS to be built with non-standard Tomcat package.

Change-Id: Icfb512558d5918eba960e27f5a74ea4f4035bd61

jss-4.5.1 introduced SSLSocket.boundSSLVersionRange which clamps a
TLS version range configuration to the system crypto policy.
tomcatjss has been updated to use this routine.  Update the spec
file accordingly.

This reverts commit 1484e650.

jss 4.5.0 was not released yet.  Let alone 4.5.1!  So we will
put the new jss symbol back into 4.5.0 and revert the dependency
bump in tomcatjss.

A new TOMCATJSS_7_3_REPO parameter has been added to specify the
repository that provides TomcatJSS 7.3 dependencies. By default
it will use @pki/10.6.

Change-Id: I85bae1605bfc60d858b232d2d6b7d5049ff3d76c

The TomcatJSS class has been modified to use the new SSLVersion
enum in JSS which supports TLS 1.3.

Change-Id: I7940a2be9cf3675baeea082c60292a4e70d7d6a7