added test alignment files for dataloader unittest

tests/test_data/alignments/4i6p_A/mgnify_hits.sto

+# STOCKHOLM 1.0
+
+#=GS MGYP000179780280/48-90 DE [subseq from] PL=10 UP=0 BIOMES=0000000011000
+#=GS MGYP000502978124/9-85  DE [subseq from] PL=11 UP=0 BIOMES=0100000000000
+#=GS MGYP000252309144/2-40  DE [subseq from] PL=10 UP=0 BIOMES=0000000010100
+#=GS MGYP000308361322/5-70  DE [subseq from] PL=01 UP=0 BIOMES=0110000000000
+#=GS MGYP000223778335/1-29  DE [subseq from] PL=01 UP=0 BIOMES=0000000011000
+#=GS MGYP000036718232/2-50  DE [subseq from] PL=00 UP=0 BIOMES=0110000000000
+#=GS MGYP000262059246/1-65  DE [subseq from] PL=10 UP=0 BIOMES=0110000000000
+#=GS MGYP000027820786/2-40  DE [subseq from] PL=00 UP=0 BIOMES=0110000000000
+#=GS MGYP000267758348/2-40  DE [subseq from] PL=00 UP=0 BIOMES=0110000000000
+#=GS MGYP000076495019/18-59 DE [subseq from] PL=01 UP=0 BIOMES=0101000000000
+#=GS MGYP000218021762/10-50 DE [subseq from] PL=01 UP=0 BIOMES=0000000011000
+
+query                          GPGSEFKVTVCFGRTRVVVPCGDGRMKVFSLIQQAVTRYRKAVAKDPNYWIQVHRLEHGDGGILDLDDILCDVADDKDRLVAVFDEQD
+MGYP000179780280/48-90         --GGGMKVTVCFGRTRVVVPCGDGHMKVFSLIQQAVTRYRKAIAK-------------------------------------------
+MGYP000502978124/9-85          ----------LFNTVKIVVPCGDGEKTVRELTQLATIRYKKATGKPRLSWVSVHSLKAKEGGILDPDDRLVDVCDDREQLIAYYDEE-
+MGYP000252309144/2-40          ------KVTVCFGRTRVVVPCGDGHMKVFSLIQQAVTRYRKAIAK-------------------------------------------
+MGYP000308361322/5-70          ---------------------SDGELSVRELTQLATTRYKKATGKARLSWVSVHSLKAKEGGILDPDDRLVDVCDDREQLIAFYDEE-
+MGYP000223778335/1-29          ----------------------------------------------------MHRLEHGDGGILDLDDILCDVADDKDRVS-------
+MGYP000036718232/2-50          ------KVTVCFDRVRVIVPCGDGDLLVKELTEKAVLRYKKATGKVSCEWIQESR---------------------------------
+MGYP000262059246/1-65          ---------------------GDGDISVRELTNLATVRYKKAIGKPLGFYVSVLSLKSYEGGILDPDDCVADVCDDREQLQALFDD--
+MGYP000027820786/2-40          ------KVTVCFDSVRVIVPCGNGDLTVCELIERAVSRYRKATNK-------------------------------------------
+MGYP000267758348/2-40          ------KVTVCFDAVRVIVPCGNGELTVTELIERAVSRYRKATNK-------------------------------------------
+MGYP000076495019/18-59         -PGARMKVTVCFGKTGIVVPCKEGQLRVRELTQQALQRYLKTR---------------------------------------------
+MGYP000218021762/10-50         --GGGMKVTVCFGRTGIVVPCKEGQLRVGELTQQALQRYLKTR---------------------------------------------
+#=GC RF                        xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+//

tests/test_data/alignments/5kc1_A/mgnify_hits.sto

+# STOCKHOLM 1.0
+
+#=GS MGYP000596977035/1-183  DE [subseq from] PL=00 UP=0 BIOMES=1000000000000
+#=GS MGYP000476752113/14-133 DE [subseq from] PL=00 UP=1 BIOMES=1000000000000
+
+query                           MSTLAEVYTIIEDAEQECRKGDFTNAKAKYQEAIEVLGPQNENLSQNKLSSDVTQAIDLLKQDITAKIQELELLIEKQSSEENNIGMVNNNMLIGSVILNNKSPINGISNARNWDNPAYQ-DTLSPINDPLLMSILNRLQFNLNNDIQLKT-EGGKNSKNSEMKINLRLEQFKKELVLYEQKKFKEYGMKIDEITKENKK
+MGYP000596977035/1-183          -------------------------------------------MSQNKLSSDVTQAIDLLKQDITAKIQELELLIEKQSSEENNIGMVNNNMLIGSVILNNKSPINGISNARNWDNPAYQ-DTLSPINDPLLMSILNRLQFNLNNDIQLKT-EGGKNSKNSEMKINLRLEQFKKELVLYEQKKFKEYGMKIDEITKENKK
+MGYP000476752113/14-133         ----------------------------------------------------------------------------------------------------------SLAKTRSWDNSRNMGSGLGSSSDPLLISILGKLQSNLINSISEQCKEDPQVLKELDGRIAQQFSQFRKELALYEQKKSKDYNARLEQAIAENKK
+#=GC RF                         xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+
+query                           LANEIGRLRERWDSLVESAKQRRDKQKN
+MGYP000596977035/1-183          LANEIGRLRERWDSLVESAKQRRDKQKN
+MGYP000476752113/14-133         LSNQILKLRGRWDSLVESAKQRRSRQ--
+#=GC RF                         xxxxxxxxxxxxxxxxxxxxxxxxxxxx
+//