v2.x - Replace RubySaml::XML::Crypto namespace with RubySaml::XML #503

Job	Run time
rubocop	10s
Unit test (ubuntu-20.04, 3)	1m 38s
Unit test (ubuntu-20.04, 3.1)	1m 43s
Unit test (ubuntu-20.04, 3.2)	1m 48s
Unit test (ubuntu-20.04, 3.3)	1m 50s
Unit test (ubuntu-20.04, 3.4)	1m 47s
Unit test (ubuntu-20.04, jruby-9.4)	2m 37s
Unit test (ubuntu-20.04, truffleruby)	3m 35s
Unit test (macos-latest, 3)	1m 36s
Unit test (macos-latest, 3.1)	1m 28s
Unit test (macos-latest, 3.2)	1m 34s
Unit test (macos-latest, 3.3)	1m 28s
Unit test (macos-latest, 3.4)	1m 31s
Unit test (macos-latest, jruby-9.4)	2m 4s
Unit test (macos-latest, truffleruby)	2m 36s
Unit test (windows-latest, 3)	3m 46s
Unit test (windows-latest, 3.1)	3m 9s
Unit test (windows-latest, 3.2)	3m 10s
Unit test (windows-latest, 3.3)	3m 15s
Unit test (windows-latest, 3.4)	6m 30s
finish	2s
	47m 17s

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